Glossary

The lore of Akihabara Dennō Gumi draws heavily from alchemy, an ancient protoscientific philosophy focused on material and spiritual transformation. It also incorporates elements of Greek mythology, Judeo-Christian concepts, and Rosicrucianism, an esoteric movement influenced by alchemical principles and aimed at fostering intellectual and spiritual growth. Many of the series’ concepts and language are inspired by these real-world traditions, though there are also some unique ideas thrown in for good measure.

This glossary page aims to clarify and explain the various terms used throughout the series specifically in the context of Akihabara Dennō Gumi. Please note that the explanations of term origins here are brief and intended only as basic introductions.

Terms and their meanings in Akihabara Dennō Gumi

Term	Details	Name origin
Abigor (アビゴール)	An AI-powered computer that runs Primum Mobile in Crane's stead.	A Great Duke of Hell in demonology known for his ability to to uncover hidden truths and predict the outcomes of wars.
Akihabara (アキハバラ)	A neighbourhood in the Chiyoda ward of Tokyo known for its shopping district that specialises in electronics and otaku culture. The heroines of the series live in this district, and it serves as the primary setting for most of the story.
Akihabra Dai San Chūgakkō (アキハバラ第参中学校)	The junior high school attended by the heroines, led by Principal Ryuugasaki Washuu.
Akihabara Dendō Shibire Gumi (アキハバラ電動しびれ組)	The team formed by Jun, Miyama, and Hatoko after they abandon their villainous ways.
Akihabara Dennō Gumi (アキハバラ電脳組)	The group formed by Hibari, Suzume, and Tsugumi, later joined by Kamome and Tsubame.	Hibari coined the name by combining ideas from Suzume and Tsugumi.
Amphitrite (アンフィトルテ)	The Diva that Billiken transforms into, specialising in combat with a "Battle Chainsaw" energy weapon, which she can detach.	The Greek goddess of the sea.
Anima Mundi (アニマムンディ)	In the series this specifically refers to those with unique spiritual potential (Hibari and her friends). Only the Anima Mundi can summon the Divas from Primum Mobile using their Pata Pi.	The Latin term for a "world soul".
Aphrodite (アフロディーテ)	The Diva that Densuke transforms into, specialising in high-speed combat. With her wings, she is the fastest of all the Divas, using both hand strikes and kicks in battle.	The Greek goddess of love and beauty.
Apostles (アポストルス)	A Rosicrucian power suit exoskeleton that attaches directly to the user's chest and sits over the human body. Built to allow a human to engage in combat with a Diva.	From apóstolos in Classical Greek, referring to an emissary. In Biblical scripture it is often linked directly to the twelve original disciplies of Christ, though it can be applied broadly to those advocating for a particular cause or idea.
Asmodeus (アスモデウス)	Death Crow's Apostle suit, which features razor-sharp claw blades capable of cutting through almost anything.	The King of Demons in Jewish demonology, sometimes associated with lust and wrath in different interpretations.
Astaroth (アシュタロス)	Blood Falcon's Apostle suit which boasts two large beam canons mounted on the suit's "breasts."	A Great Duke of Hell from traditional demonology known for his power and influence.
Athena (アテナ)	The Diva that Tetsuro transforms into, specialising in close-range combat with a similar speed to Aphrodite but greater firepower. She wears a helmet, armour and shield.	The Greek goddess of wisdom, warfare, and handicrafts.
Avatar (アルヴァタール)	A type of cyborg weapon utilised by the Rosicrucians that blends animal genes with cybernetics. Summoned by striking a special staff into the ground.	The word "Avatar" comes from the Sanskrit term avatāra, which means "descent." In Hinduism, it refers to the earthly manifestation of a deity in bodily form.
Beelzebub (ベルゼブブ)	Dark Pigeon's Apostle suit, which comes equipped with two small, bird-like devices that can operate independently of the main suit. These "birds" provide both attack and defense support.	A prominent demon in demonology, often considered another name for Satan in Abrahamic religions, or alternatively, a unique prince of Hell representing gluttony and envy. Later texts note him to be capable of flight and "Lord of the Flies."
Billiken (ビリケン)	Kamome's Pata Pi. He functions as both a piggy bank and a counting device as needed. Billiken speaks in the Kansai dialect, like Kamome. Transforms into the Diva, Amphitrite.
Cerberus (ケルベロス)	Blood Falcon's Avatar which features a three-point rotating head and beam cannon.	The three-headed dog that guards the gates to the underworld in Greek mythology.
Cockatrice (コカトリス)	Dark Pigeon's Avatar and the only one capable of flight. Originally bird-like in appearance, it evolves into a plant-like creature with a single eye by the film.	A biblical beast, often described as a serpent or dragon with the head of a rooster.
Densuke (デンスケ)	Hibari’s Pata Pi, given to her by her mysterious Prince. At first, Densuke seems simple and is suspected of being a counterfeit or possibly glitchy, but truthfully he can turn into the Diva Aphrodite. For most of the series, Densuke only says "piii," but later adds the word "hotcake" to his limited vocabulary.	The name Hibari had picked out for her younger brother in childhood.
Diva (ディーヴァ)	Artificial mobile weapons powered by neutrinos from Primum Mobile. These "goddesses" are a blending of human and machine that are summoned to Earth by the synchronisation of an Anima Mundi's brainwaves with the summoning mechanism of her individual Pata Pi. Once summoned, the necessary parts to construct the Diva are instantly transported from Primum Mobile. She then rapidly grows to full size and is covered in armor, ready for battle. In the TV series Hibari and Tsubame are able to perform a spiritual fusion with their respective Divas and join with their bodies in battle. All the Anima Mundi unlock this capacity in the film.	The Latin word for "goddess."
Elixir (エリキシル)	A powerful potion that grants conditional longevity and potential immortality, originally developed by Paracelsus, Rosenkreuz's master. Both Christian Rosenkreuz and Cigogne Raspailles drink it in the series. The effects of the elixir last for approximately 500 years before its life-extending properties run out and it must be consumed again.	Inspired by the "elixir vitae" or elixir of life, a legendary substance believed to grant extended life and preserve youth, that traditional alchemists sought to produce.
Enoken (エノケン)	Uzura's Pata Pi, recognisable by its distinctive nose and long, dog-like ears. It has the ability to detect girls who match Uzura's preferences. However, since Uzura is not an Anima Mundi, Enoken cannot transform into a Diva.	Named after the legendary comedian Enomoto Ken'ichi who went by the stage name Enoken.
Erinyes (エリヌース)	The Diva that Petit-Ange transforms into. She is capable of generating large-scale tachyon fields and can also supply energy to other Divas using a generator that converts neutrinos.	The Greek goddesses of vengeance.
Francesca (フランチェスカ)	Suzume’s heavily customised Pata Pi, known for its impressive functions. Francesca has highly articulate speech functions and is equipped with a variety of features that come in handy during critical moments, including missiles. Full name is "Francesca Leopold Classic Renoir Zanhassa San-sei Jr." Transforms into the Diva Hestia.
Hestia (ヘスティア)	The Diva that Francesca transforms into. Although equipped with dual beam cannons, her most formidable ability is creating powerful barrier fields.	The Greek goddess of the hearth and home.
Homunculus (ホムンクルス)	Rosicrucian minions made by injecting a syringe full of nanomachines into the soil. These beings take on a humanoid shape and can be used in battle, though they are no match for the Divas.	The "little people" artificially created through alchemical practices, a concept first described in writings traditionally attributed to Paracelsus.
Lucifer (ルシファー)	Shooting Star's Apostle suit and the only suit shown to have a masculine design. It features a beam cannon, but its primary weapon is a black sword.	In Christian theology, an alternate name used for Satan. He is notable for having been a high-ranking angel before his fall from grace.
Metatron (メタトロン)	The codename originally used for Crane's journey into space. Rosenkreuz continues to refer to Crane by this codename while he is in Primum Mobile.	An angel found in Judaism, Gnosticism, and Islam, often depicted as a powerful intermediary between God and humanity.
Pata Pi (パタPi)	Electronic pets that are popular with young people, particularly girls. Pata Pi can be customised to suit their owner's preferences, with numerous shops around Akihabara offering accessories and customisation options. While most Pata Pi are regular cyber toys, the ones belonging to the Anima Mundi in the series have the unique ability to transform into Divas.
Petit-Ange (プティアンジュ)	Tsubame’s Pata Pi, easily recognisable by its unique purple body and pink wings. Petit-Ange often sucks on objects or other Pata Pi like Densuke in a childlike manner. Despite its playful side, it can be highly aggressive, with impressive combat abilities and a strong protective instinct towards Tsubame. Its vocabulary is mostly limited to the sound "muni~." Transforms into the Diva Erinyes.	"Little angel" in French.
Primum Mobile (プリムムモビーレ)	The artificial satellite where Crane and the Divas reside. In the series it was the first manned rocket in human history, launching Crane into space in 1916. While originally a standard rocket it now looks like a fairytale castle, thanks to the AI Abigor altering its appearance using materials collected in orbit. Primum Mobile is equipped with electromagnetic weapons capable of disabling modern electronics and weapons on Earth. It also receives brainwaves sent by the Pata Pi, triggering the transfer of the Divas to Earth when needed.	Latin for "first movable" referring to the outermost moving sphere in the geocentric model of the universe in classical astronomy.
Skeleton (スケルトン)	Death Crow's Avatar that appears as a skeletal humanoid body cloaked in black. It can transform into a gelatinous slime, allowing it to reform in a different location to evade attacks.	Skeletons from folklore, often used as personifications of death.
Tetsuro (テツロー)	Tsugumi’s Pata Pi, who matches his owner’s strength. Tetsuro is not only physically powerful but can also generate flames and fly when necessary. His secret feature is a microphone, which Tsugumi uses for karaoke. His vocabulary is limited to variations of "guuu." Transforms into the Diva Athena.	The masculine Japanese name Tetsurō, which is derived from the word for iron (tetsu), symbolising strength.

Additional terms

Several of the audio CDs from Akihabara Dennō Gumi have titles inspired by alchemy. Here are a few of those titles explored for those interested in further alchemical references from the series.

Term	Where used	Origin
Azoth	Name of the second Akihabara Dennō Gumi original soundtrack CD.	In alchemy, Azoth is a mystical agent of transformation, often considered a universal remedy. Believed to be the fundamental essence that permeates all matter, Azoth holds the power of transmutation. This agent, due to its solvent nature, is now considered an early interpretation of the element mercury.
Rebis	Name of the first Akihabara Dennō Gumi original soundtrack CD.	Rebis, in alchemy, represents the union of opposing qualities. The term is derived from the Latin "res bina" meaning "double matter." The image associated with this state, depicting a unified humanoid with both male and female traits, first appeared in Azoth of the Philosophers.
Rubification	Name of the Akihabara Dennō Gumi character image album CD.	In alchemy, "rubification" refers to the fourth and final stage in the creation of the philosopher's stone, where the white material from the albification process turns red. This colour change represents not just material transformation but the attainment of spiritual enlightenment.

Terms and their meanings in Akihabara Dennō Gumi

Additional terms

Further reading