Ai Chan (Full name: Self-regulatory Unit A1) was destroyed by the last generation K23 Defensive Self-regulatory Unit and later awakened by Theresa who came to investigate the Arctic Ocean island.
After the battle with Theresa, A1 ran out of energy, lost most of the memory and abilities. Theresa connected Ai to the Hyperion system, giving birth of the artificial intelligence.
Within the Honkai Impact 3rd game she acts as your in-game AI guiding you through many different aspects of the game.
Other aliases:
Naoe Kanetsugu
Discipline Enforcer A1
Person: green hair, long hair, double bun, brown eyes, ahoge, bangs, sidelocks, flat chest
Outfit: see-through dress, elbow gloves, short shorts, crop top