Stacy Hirano (Phineas and Ferb)

From J-Wiki

Stacy Hirano, often nicknamed Stace by her friends, is a Japanese-American supporting character in Disney’s popular animated TV series Phineas and Ferb. She is Candace Flynn’s cute, tomboyish and very enthusiastic best friend and is usually heard talking to Candace on her cell phone much of the time. She is also good friends with Jeremy Johnson and Jenny Brown, and is the older sister of Ginger Hirano.

Stace

Her grandmother is called Bāchan Hirano (Phineas and Ferb) and she has a lot of cousins in Japan.