[thor94]

Spoiler for spoiler:

where have you seen Eve healing brain damage?

For feeling, only cruz see his companions as family, but eve and blade haven't not really show family relationship for him:
-when cruz was in danger they have shown a master attitude, remember this sentence said to aruka in simeon arc "you can't fight/kill my servant without my permission" , or he see him as a cute toy/pet (when he is crossdressed)
-when eve create a stomac mouth to reanimate him (even Teru have found this action heartless)
-In the well (ch54), Eve not said "i appreciate/like you" but only "i don't hate you" (she have begun see cruz more as companion but not as family member)
-And there is the city arc, normally we don't left his family alone in dangerous area (it's the blackspot)

to return in cruz situation, it's would be wicked from author to kill him, same as seinen/shonen main characters, he have done much efforts and suffered hugely (physically and mentally) in hope to become strong to help/protect his friends/companions, but unlike them he still has not obtained the deserved power (he have obtained nothing at all)