Kawa/yoo calls that red-haired girlish character red unknown (レッドアンノウン). It's his original character, not tied to any copyright.

Thanks! I never know what to do with original recurring characters. If they have a name it makes things a bit easier at least.

This pic looked like a PC motherboard from just its thumbnail. It however, is very cool, despite the slight feeling of claustrophobia.

[deleted]