Hanabi is so desperate to get Ichinose back. Since she can't get the real Ichinose back, she somehow convinced all the guys to copy his haircut. Hanabi will pick the guy that looks the most similar to the real Ichinose.
How could you not keep such a nice girl like Yukishiro? Like she already gave the hints that she is not that much of a frail person who needs too much protection.
On the other hand, here we have Hanabi trying to make everyone look like Ichinose to prove that Yukishiro only became interested in Ichinose because of his looks (i.e. "she'll fall in love with anyone who looks like Ichinose")
P.S. That scene was like in the movie "Being John Malkovich"
If we don’t get a worst girl redemption arc soon gonna drop this bs, ‘just another dunking on bullies power fantasy’ romcom ain’t enough to jingle my bells these days, not even a dime a dozen in this economy