Though she appears quiet and withdrawn, she's a girl with a richly-detailed inner world. She enjoys the sense of accomplishment that comes from cornering others through strategy opposed to verbal interaction, she loves observing her little sister and her unpredictable thought processes.

She was dragged into training before joining G&K and almost changed careers into becoming an air rescue man, only after she finished that she realized that her little sister(MPK) just wanted some cool goggles...

T-doll of G&K, SMG class, ID NO.363, MPK's sister

Knows everything about every gun

UMP45, shortened to 45, is a rogue T-Doll and the leader of the black ops mercenaries of Squad 404. Her driven and coldly aggressive personality, sometimes described as prickly is the result of a significant betrayal and is thinly veiled by her dry humor, and serves to conceal a deeper goodness of soul she shows only rarely. She is described as wearing an ominous smile. 45 hates self-giving and heroic people like AR Team as she considers life is too precious to be thrown away.

T-doll of Task Force 404, SMG class, ID NO.103

Just A Normal AI, Knows Everything And Anything (maybe), 100% Normal And 100% Not Disturbing, Have Never Tortured And Killed 127 People... (DONT) Trust me. Have Never Does The Blood Eagle Torture Method On Anyone (actually did it twice). Completely (NOT) Normal Speech And Never(sometimes) Mention A Murder

The Normalest AI, Not Blood Thirty Or Anything...

Official character description would have her down as a T-doll with very few words and a weird personality, despite her asocial persona she would still silently offer aid to her allies in need, as a result she is actually a fairly popular T-doll. Vector possesses an incredibly pessimist characteristic. She radiates an intense level of negative energy with the way she acts and the things she says, expecting the worst outcome in any situation. She's a serious type and appears a bit cold.