[The curve of her smile at that last part is a little sad; Nami hadn't expected to hear that from Sanji, and the fact he's been pushed enough to say it now is telling.

As for the first part...]

Noel will think nothing less of you. [She says that absolutely firmly.] You stood by her after the Malnosso messed with her head last year. She'd think the world of you, and no experiment is going to change that.

[More quietly:] Things might be a little different, but friendships are always changing anyway.