Jimmy & Martyn are brothers on two opposing sides, neither knowing the truth. Martyn thinks is little brother is dead, knows his sister(Liz) is dead because of Cleo & Ren, and still followed Ren.
He doesnt care that Ren died, he doesnt care Cleo almost died. He "lost" both of his siblings, and honestly Martyn couldnt care less about the heroes & villains post the "death" of Jimmy & the death of Lizzie. He physically fought Cleo and Ren post Lizzie's death; had no clue about Jimmys death so he went off grid and only Cleo knows where he is.
Cleo left the villain life and is also off grid now, with Martyn. (platonically), the two live together off grid. Theres unresolved issues between them, but they dont talk about it. Its there, they know it is, but they wont talk about it.
Jimmy thinks his big brother is dead just like his big sister.
Civilian -> Martyn Shadow-Wood (half brother, Liz & Jim thought his last name was Shadow-Solidarity)
Off Grid -> Martyn Shadow, dropped the "wood" part of his name.
Civilian -> Cleo Zombie, at one point Cleo Labs (was married to Etho Labs, they divorced. Platonic marriage, both decided they shouldnt be married)
Off Gird -> Cleo Shadow, "sister" of Martyn in a way, but can also be mistaken as a "second" marriage. Its not a marriage, she just decided "Fuck it, Shadow's my last name now"
Bdubs is 10 & lives with them, calls Martyn "Uncle Marty" & Cleo "Mom" (Im a big C(l)ockers fan ok.. they were so sweet..)