1) Her ability somewhat suspicious in term of Oda's plot-twist material. Okay, she might be evil in the past. She would falsify everyone's memory for her own good in the past but later on, she's doing it for other's sake. Everything is possible in Oda's world.
2) She might be the one who told Jinbe in Luffy and Nami's current whereabout.
3) Sanji is hurting TT^TT pls make it shtapth