Like her brothers, she is seen wielding a weapon, a poison dagger which paralyzes it's victim. Also, like Bleu she can jump large distances at great heights. One of the few times we see blood in the show is when Jeanette slashes Louise's hand. She is a mage, that is confirmed in Season 4 Episode 12. She uses her umbrella as a wand.
After licking Louise, she said she could taste the power, whether or not this is an ability is yet to be confirmed.