5 Five

AK-005, or just Five, is one of the Project Akarus experiments, and one of the easiest to miss. Sneaky, clever, and a bit of a kleptomaniac, Five is hard to keep track of in many ways- not only is he just naturally quiet and good at stealth, but he can also turn into a living shadow on the walls, visible only if you pay attention to the odd change in the light. Of course, he uses this for either pranks or petty thievery, hoarding a bunch of shinies and trinkets he's swiped in his room of the AKs' current home.

When he's not skulking around looking for things to steal, Five is rather chatty and amicable among his fellow AKs, but is thoroughly distrustful of anyone else. He tends to hide himself as a shadow when around normal humans. He isn't very strong and would rather hide than try to fight somebody.

He's the one who found Zero in the lab's basement, and along with her, he helped instigate their escape.