Her name is Ichika Usami (IchiGO UsaGI), the lead/pink Cure of this season. Not sure what this season's about. Something about evil fairies corrupting food items, usually sweets. I just noticed Ichika in particular and immediately came to adore her. I've seen pics and gifs of her and she is loads of energy and fun.
And her socks are also strawberry themed. So cute.
Apparently she actually appeared in the final episode of the last Precure season, showing up to help fight. That's an interesting way to introduce the new season. Cure Whip is a strange name, but I get that it ties into the confectionery theme of this season. Although, a Cure using a whip as a weapon would be interesting.
As mentioned in the first post, this series seems to take a lot of cues from Tokyo Mew Mew, having the main girls work in some kind of cafe or sweets shop.