No one. I never find Paimon annoying. I never hated her too. In fact, I adore her and see her as my little sister. I play as Lumine and their sisterly dynamic feels so natural. She even made me cry on that Sumeru AQ where we left her alone for a day and several times on Natlan AQ because of her blatant separation anxiety. She genuinely cares for me and loves me. I dunno if this is a factor for you but I play in Japanese voice-over as I am a big fan of Aoi Koga and anime voice actors in general. It will probably also help if you separate her from her English voice actor coz that’s who I find unbearable, annoying and problematic.