Nebora only removes 1 collar?

[Pebbles]

Just beat the Arena of Joy and removed my collar. But somehow Nebora doesn't treat my companions as champions so she won't remove their collars?!?! wtf inconsistent

[Yaldabaoth]

There can be only One. Not Four. You can get the others removed later.

[Chosokabe Wariamu]

Yep. She only has eyes for you!

But be careful what you wish for....(and worry not...there are other means to collar removal)

[Jork]

if you're playing coop have your partner(s) beat you in the arena after having your collar removed, she'll remove theirs too