Isabella Garcia-Shapiro (10th Dimension)

Isabella Garcia-Shapiro is the across-the-street neighbor and best friend of Phineas and Ferb. Isabella has a crush on Phineas; however, she doesn't tell him. She's the leader of Fireside Girls Troop 46231, and often volunteers to help in Big Ideas, usually with her troop being involved.

After Event Phineas and Ferb: Mission Marvel for 4 years She join the project super soldier with Phineas then ues it make him becoming supers Strength like Steve Rogers he was one of Alive captain Americas Before Cap is melt from ice she fight alongside with Cap Phineas