Head of the GRPT's General Military Unit
Diana Kaizer, referred to by her friends and superiors as simply 'Kaizer' and by her subordinates as 'Commander', is the youngest of the GRPT's Founding Five, and simultaneously the most serious. She's often annoyed by the fact that her division is considered by most to be the weakest of the group, especially considering the fact that it is easily the largest, but she can also argue that it is the most varied of the groups and best utilized when taking down smaller threats.
From your standard tanks and airstrikes to genetically enhanced super-soldiers and advanced tactical weaponry, Kaizer's resources seem nearly infinite. The same could be said about the sheer quantity of personnel she has under her employ, mostly consisting of ex-military mercenaries with the occasional riffraff thrown in. After all, sometimes she needs to be certain that her staff isn't afraid to get their hands dirty.
While she individually is the least-equipped to deal with macros in one-on-one combat, she's no stranger to the concept of tearing out of the smaller ones, and often carries a large assortment of hidden blades and other weaponry on her person for this very reason. As she and many unfortunate members of her staff have learned, being eaten alive is a very real risk in her line of work. The young woman has survived a total of three ingestion attempts that are on record.
In regards to her life outside of work, Kaizer is the quiet girl amongst the five original GRPT members, quite the contrast to her brash and commanding actions on the battlefield. Nexal, the Mech Commander, seems to be her connection to the group, and due to her experiences, she has a bit of trouble trusting Leah. Still, she manages enough, and doesn't show disrespect towards her friends, often thanking them graciously for even the littlest courtesies. It's hard to earn her trust, and she's apt to just ignore most people outside of the circle that try to approach her on anything other than a formal, business-like manner.