Phoebe and
Chloe are nearly tied for me.
Penelope has the most teasing potential, so I would rank it last of the three.
Both
Phoebe and
Chloe sound youthful. I like
Phoebe's "bright" meaning and moon association.
Chloe is associated with
Demeter and growing things. I think I like
Chloe a hair more due to the spelling making more sense to an English speaker.