Dive Deep into Creativity: Discover, Share, Inspire
Their mother would always be very open about who was her favorite child at any point in time. It was usually Darcy (because she was a suck up) or Stormy (by default). It was almost never Icy because she was more likely to be blamed for her sister's behavior.
This led to them being so vulnerable to Valtor pinning them against each other later on.
Dancing skills:
Icy: No one will ever know. She is too self conscious to try. She will act like she is too cool for it (pun intended) but in reality she doesn't want people watching her.
Darcy: Also will not dance, but she does know she is bad. I just think it would be really funny if she is completely in control emotionally and is a skilled manipulator, but if you put her on the dance floor she is an uncoordinated mess.
Stormy: Like in season 8 I think she is just a randomly good dancer. Like normal people I don't really consider seasons 5-8 cannon, but I just think this is really funny. Her being good at dance us really random, but it fits her well. She can destroy anyone at just dance.
None of the trix know how to cook. Not even Darcy. They are all terrible and will burn the house down. Stormy would do it on purpose if you make her try
My explanation/ headcanon of Stormy wears skirts much more often than Icy and Darcy (and the winx actually) in the seasons that count anyway
I always liked to imagine that both Icy and Darcy are just completely gorgeous. Meanwhile Stormy is more average. As the trix got older she started feeling self conscious about her looks and started wearing more skirts to try to appear more feminine and more beautiful. It didn't really matter to anyone but her, but it made her feel better even if it didn't really make her happy.
As opposed to Icy and Darcy who are very comfortable in their pastel preppy and dark hippie styles, Stormy never really got a chance to discover her style and her clothes more reflect wanting to fit in vs. reflecting who she is
Of course due to evil shenanigans the trix end up wearing potato sacks forever