A SOLDIER by anyother name...But this one is different.
Kei,Is a android,Made to hack into computers,handheld devices ect. Its voice is very firm,and robotic. Its wheres what is similar to a male SOLDIER outfit.
It always says "Correct,Sir,Hai,Processing now,Begin now." When Its mind is focused on a machine.
(Yes..Kei is a it...Internally a herm..Hehe hurray soldier..)