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Prototype Ai-A is a character appearing in the Yu-Gi-Oh! VRAINS anime.
Prototype Ai-A is a Ai created by SOL Technologies. When Playmarker infiltrated SOL's mother computer, Kitamura sent Ai-A and Ai-B hunted after Playmaker, who managed to elude them. However, Ai-A caught up with him, and initiated a Duel with him. Ai-A brought out "Tentacluster Nautilus", and Released his "Tentacluster Drillworm", making Playmaker discard all of his cards. Playmaker drew a card, but had to sent it, due to "Tentacluster Drillworm", ending up with no cards to play. Ai-B arrived and started attacking Playmaker, intending on grabbing his Duel Disk. Much to everyone's surprise, Blue Angel arrived, using her whip to grab Ai-B. Blue Angel declared she would be the one to defeat Playmaker, and started a Duel with Ai-B. Continuing the Duel, Playmaker Summoned "Vector Square Daemon" and used its effect to revive "Tentacluster Nautilus" and gained another attack. He then destroyed "Tentcluster Nautilus" and defeated Ai-A who vanished into thin air.
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|Prototype Ai-B||16||Not shown|
|Main||Aoi Zaizen • Go Onizuka • Yusaku Fujiki• Takeru Homura|
|Cyberse||Ai •Flame • Linkuriboh|
|Den City||Aoi Zaizen's robot • Den City orphanage owner • Eagle • Emma Bessho • Frog • Go Onizuka's manager • Hosoda • Isomaki • Jin Kusanagi • Makoto Kimishima • MC • Naoki Shima • Pigeon • Roboppy • Shoichi Kusanagi • Tanaka • Sato • Suzuki|
|SOL Technologies||Akira Zaizen • Bishop • Blood Sheperd • Hayami • King • Knight • Kitamura • Pawn • Prototype Ai-A • Prototype Ai-B • Queen • Rook|
|The Knights of Hanoi||Doctor Genome • Faust • Kyoko Taki • Kiyoshi Kogami • Revolver • Spectre|
|Other characters||Bit• Boot•Haru • Bohman|