I love the idea that Posadist and Transhumanist knew each other even before the whole Centricide began. They're both crazy scientists that feed into each others insane ideas and it's awesome sauce. I imagine that they're both scientists from the Cold War period (both working in a laboratory within the Eastern Bloc.) After the incident that would lead Posadist to go into hiding due to becoming a radioactive creepy little creature, they would part ways until reuniting in the Centricide.
β³ {Headcanon ramblings below!:}
Posadist is a Cis-man (He/Him), Bisexual and Asexual. He's a (nuclear) physicist. Trotskyist is his father but it's going to be a while until I get around with designing him. (Q_Q)
Transhumanist is Agender (He/It) and Gay (MLM.) He's also a STEM major but specialises in robotics.
I like to think that in terms of personality, they're complete opposites. Transhumanist is more cautious, less likely to take risks and wears his proper PPE, while Posadist is impulsive, doesn't care for the rules and his own personal safety (which would later bite him in the butt.) Transhumanist finds Posadist's behaviour and antics frightening yet still finds him endearing anyway.
β³ {Other miscellaneous details!:}
β¦=- Posadist is Argentinian and Transhumanist is Czech.
β¦=- Transhumanist has a speech disorder (stuttering.)
β¦=- My ship name for them is LOVEBUG(.TXT) teehee :3c