Spoiler: Will Robin and/or Gaban inflict any real damage on the Holy Knights? (Read Description)

Spoiler warning for those who didn't read the chapter_____________________________________________________________________________________

Hey guys, L here. In the latest chapter of OP, Saul explained to Robin about the Holy Knights being immortal, even though he didn't further explain it to her.

But when seeing that scene, as well as having her & Gaban stand in their way, do you think that one of those 2 will be able to inflict real damage to them? Which may be a necessary edge in an effort to level the playing field.

If you have any opinions on this topic then please tell me in the comments section below, and check out the links for more information. Thank you!