Talk:Ferris/@comment-222.252.41.67-20201001005349/@comment-171.4.248.12-20201008082141

Felix can destroy the gate's circulation system inside the body of those whose Od has been interfered by him (while healing them). He used this to stop the possesed-Subaru in season 1 EP 23, and he used this ability to kill Julius in Pride IF.

So, I can't answer if it was intentionally or not, but the fact that he could potentially instant-kill a lot of "allies" does exist.