Vanilla is a product of Lussumo:
Documentation and Support.
Just a random thought here(which might be completly off)but what if Luke was wrong?I mean HE is immortal and survived being shot in the guts and in the head,but what if he was the only one toKnow how to/have unlocked that fonction of the package?I mean Arkady is the only one knowing how to teleport and karl the only one knowing how to shift weather patterns,so what if Luke's self healing ability developed itself to that point as a result of being hit and shot very often?I mean kirk had to be hospitalised after being shot by Luke,while Luke was still able to walk and fight after that.Arkady has also seen the FutureFreaks; we were first introduced to them when she drowned. Mark came back to life too. No, I think we can be pretty sure about this. They cannot die.
@Nakedcelt:and yet in the first episodes(can't recall the exact number)Arkady said that she knew when Luke would die,and that she basically saved him by "overdosing"him,so that would mean they can die.It's Episode 11 page 6, and what she says is "Yesterday, you were going to control and assault Janine, and Sirkka was going to pick up on it. There was going to be a big group trial, and you were going to lose your temper, and everyone was going to get together and kill you."
Luke was "dead." Briefly.
Maybe the reason Mark sent Alice was to test that. To see if a non-Freakangel could kill a Freakangel.
I'm still waiting for the reaction shot of Alice when she see's Luke walking and talking again. That's going to be fun.