Ermac's first one at 7:16 looked like he was helping her. "Here you go. Stomach goes in there, small intestine there. Let's fix all these broken bones ya got. And there you go! All better.
1:09 "He's my dad. I...I can't kill him. :'(" 3:09 "I...I can't kill her. She's m best friend. :'(" 4:00 "I can't kill her. I married her." 4:19 "I'll let you live, sis." 5:08 "My family doesn't do cannibalism anymore. Wanna go out for some REAL BBQ, babe?" 11:40 and 11:50 "A warrior of great strength does not deserve death." 12:58 "Blech! I'm sticking with eating steak from now on!" 16:26 "I will let you live, daughter of Blade." 17:40 "I love you, sis."
Kyrie Irving He's like Deadpool, he can regenerate or ressurect himself if theres something to regenerate from. No remains = no ressurection/regenerate.
I think only Ermac is capable of performing a "reverse fatality"..I mean..when he kill someone, he trap his/her soul inside him and thus make himself stronger. So even after just smashing all Cassie's guts and just twisting all her bones and head, its quite easy for him (only) to perfom the exact same opposite and returning her "back to life"....only to kill her again and again...and again and again