Phinea

Phinea is the twin sister of Phineas and sister to Ferb and Candace. She is also the daughter to Linda Flynn-Fletcher. Phinea helps Phineas and Ferb out with their inventions and has met Major Monogram before but thought he was just the father to Carl because she has met him to. Phinea is a nice girl and would never do anything to harm anyone. She is a main character in Phineas and Ferb (Ult. avatar) and loves her family. Candace cares for her just like Phineas and Ferb and when they're doing their inventions Candace yells Phineas, Ferb! and says Phinea in a sweet tone not trying to make it sound like she loves Phinea more than the boys but because she's the third and final girl in the house.