I'm going to be voted down to Oblivion but I'm sick of her ruining my PvPing, can't wait till she's gone.
I seriously never had problem with her in PvP, Haruharu is a massive beast if she gets her laser going, and Tsundere Heavy Cruiser can be problematic but Iona's only a problem if you don't pack ASW-capable ships. Or you have to do a night battle, then yeah she's ruining you 90% of the time.
What I'm really going to miss is her cute "Crash Dive!".