Here are some Spirits from SSB Ultimate that had feet on the female side of the list. I will tell you who is who at the bottom of the post.

Here's the list in alphabetical order:

1. Azura (Fire Emblem Fates)
2. Din (The Legend of Zelda: Oracle of Ages/Seasons)
3. Elena (Pandora's Tower)
4. Ibuki (Street Fighter III)
5. Juri Han (Super Street Fighter IV)
6. Komurasaki (Hajimari no Mori)
7. Linde (Fire Emblem Shadow Dragon and the Blade of Light)
8. Nayru (The Legend of Zelda: Oracle of Ages/Seasons)
9. Phosphera (Kid Icarus Uprising)
10. Viridi (Kid Icarus Uprising)