This is the lovely, cute girl who always has a crush on Phineas Flynn, Isabella Garcia-Shapiro.
And these are the heroines who are similar to her.
Wendy Testaburger (South Park)
Dorothy Gale (The Wizard of Oz)
Ronnie Anne Santiago (The Loud House)
Minnie Mouse (Disney universe)
Sandy Olsson (Grease the movie)
Daphne Blake (Scooby-Doo series)
Lola Bunny (Looney Tunes universe)
Cindy Vortex (Jimmy Neutron: Boy Genius movie and TV show)
Penny Peterson (Mr. Peabody and Sherman)
Karen (Frosty the Snowman)
Emma Goodall (Power Rangers: Megaforce)
Chihiro Ogino (Spirited Away)
Lady Guan (Romance of the Three Kingdoms)
Jen Scotts (Power Rangers Time Force)
Dana Mitchell (Power Rangers: Lightspeed Rescue)
Ashley Hammond (Power Rangers Turbo)
Kimberly Ann Hart (Mighty Morphin' Power Rangers)
Katherine Hillard (Mighty Morphin' Power Rangers and Power Rangers Zeo)
Kendrick Morgan (Power Rangers Lost Galaxy)
Tori Hanson (Power Rangers: Ninja Storm)
B'Elanna Torres (Star Trek series)
Connie Maheswaran (Steven Universe)
Shizuka Minamoto (Doraemon series)
Kira Ford (Power Rangers Dino Thunder)
Dendy (OK K.O.: Let's Be Heroes!)
Ochaco Uraraka (My Hero Academia)
Madison Rocca (Power Rangers Mystic Force)
Rose Oritz (Power Rangers: Operation Overdrive)
Shelly Watkins (Power Rangers Dino Charge)
Sarah Thompson (Power Rangers Ninja Steel)
Sora Takenouchi (Digimon Adventure)
Becky Gibson (Disney's Alexander and the Terrible, Horrible, No Good, Very Bad Day)
Princess Isla (Barbie in the 12 Dancing Princesses)
Okuni (Samurai Warrior series)
Marie Roberts (Barbie & Her Sisters in A Pony Tale)
Dana Yeosan (Barbie and the Rockers)
Skipper Roberts (Barbie series)
Renee Honda (Barbie series)
Princess Bella (Barbie: Video Game Hero)
Sunny Funny (PaRappa the Rapper series)