These MHA characters managed to surpass the Number ... then Eri is willing to do that. Eri gave her horn to Aizawa, and that is what he stabbed Deku with. That said, it was made clear to the ...

These MHA characters managed to surpass the Number ... and showed a bigger heart than possibly anyone right now. Eri cut her horn off and gave it to Aizawa in the chapter when they met.