Uni (aka Black Sister) is the workaholic Noire's younger sister.  She represents Sony's handheld consoles, mainly the PSP.  She is the CPU candidate of Lastation.  Uni constantly tries to live up to her sister's high expectations.  Like Noire, Uni's also a bit tsundere.  It runs in the family.  Uni is a HUGE gun fanatic.  Other girls have boy-band posters on their walls.  Uni has guns galore.  They're her weapon of choice too.