Yo is a major character of Fanboy and Chum Chum.
Background[]
Yo is a girl of a Japanese descent with a crazy obsession towards Chum Chum, wanting to keep him like a toy much to his best friend's annoyance. Despite her antagonistic relationship with Fanboy, who she often argues and fights with, she's really just a kind-hearted girl: sweet, fun, and prepped for adventure. Her background is obscure, and as for her family, only her father has been briefly.
Personality[]
Yo is sweet and gentle (if not a bit intimidating). She is a collector of all things adorable. She owns a hoard of Yamaguchi digital pets, one of which is named Scampers.
As a collector of all things adorable, she routinely tries to kidnap Chum Chum from Fanboy, often with the plan to dress him, brush his hair, and shelve him alongside her other toys. More often than not, it's the job of Galaxy Hills' superfan to rescue him from her clutches.
Yo is similar to a stereotypical "fangirl" in the way she acts, especially toward Chum Chum. She has pictures of him in her mini closet; and has a strong obsession with Chum Chum to the point where she declares she wants to take him home with her.
Yo is a talented prankster, dominating Fanboy in multiple forms of revenge when the annual Prank Day comes around.
Yo is naturally cheerful but becomes crazed and obsessive when she interacts with Chum Chum. She is a master manipulator, using her sweet demeanor to collect large amounts of money from lemonade stand costumers, trick Fanboy into handing over Chum Chum for an awesome Mecha Tech gadget, and stop Man-Arctica from freezing the citizens of Galaxy Hills (unsuccessfully).
In later episodes, she gradually grows into a calmer and cheerful character. Whereas in the first season she was very aggressive towards Fanboy, hurting him severely on multiple occasions in pranks and fistfights. She's a lot nicer in the last season, showing compassion towards her frenemy, offering him advice, and asking him for help. She even grows close to Chris Chuggy in "Robo-mance" and accepts his hand and valentine.
Physical Appearance[]
Yo has light-pinkish-apricot skin. She has a pill-shaped body. She has long, jet-black hair with even Hime bangs that she ties into pigtails using pink bows. She wears a yellow and pink t-shirt with a smiley-face on it, a pink and green plaid skirt, and yellow, pink high-top shoes and a frog backpack. She is sometimes seen without the backpack on some occasions.
Trivia[]
- She owns a variety of Yamaguchi digital pets. Scampers, one of them, seems to have lived a long time.
- She is often trying to steal Chum Chum, with Fanboy of course always stopping her. She's shown doing this for most of Season 1, however, in Season 2 she doesn't seem to do it anymore, possibly hinting that she either toned down her obsessiveness or isn't interested in him anymore.
- She seems to be a real good prankster, especially when it comes to Fanboy. For every prank, she uses the phrase, "In Yo Face!". She then slaps a sticker on your forehead.
- During production for the series, she originally was going to be chubbier and the same size a Fanboy. She also looked like Chris Chuggy. She was changed to look skinnier and shorter than Fanboy possibly to make her look cuter.
- During her second concept art, her pigtails were originally going to be upwards instead of downwards.
- It was never explained as to why and how Yo developed her crush on Chum Chum in the series.




















