Chica was the fifth animatronic to appear on Eth's channel and hasn't been known to play many games. Her most memorable moment is when she played Can Your Pet (and we all know how that went). It wasn't until her third appearance that her companion on a plate, The Cupcake, appeared in a video with her. This same appearance was also the first times Eth made multiple characters play a game, these characters being Bonnie, Chica, and Cupcake.
Ever since then, The Cupcake has always been with Chica every time she shows up. There was even an animated short about them. The only time that the Cupcake hasn't been with Chica after this change was when she played night three of POPGOES, which was later revealed to be a theory being told by the Puppet.
Personality wise, Chica is a very kind-hearted animatronic, with two main things in mind: Pizza and her Cupcake. She has never had a full moment of anger or sadness, only the realization that people eat chickens, which caused her to throw up. She also loves cooking. This might be the reason why she barely appears in videos. She is presumed to be in a romantic relationship with Bonnie, but this is not confirmed.
She was a victim of the Fazbear Massacre (along with her cupcake) and became a phantom. Thus, she fell under Springtrap 's control and worked to kill the remaining Fazbear residents. Her cupcake however helped the remaining residents fix what Springtrap broke.
How she'll work in Ultimate Custom NightEdit
She hangs out in the kitchen, being generally clumsy and knocking over lots of pots and pans. In Custom Night, the kitchen is also where the music box happens to be, and while Chica doesn't care if the music box wound up or not, she can grow tired of the music selection playing. As long as you hear the pots and pans, Chica is content. If she stops making noise, however, then she has grown tired of the song, and you only have a short amount of time to change it. Don't get to eager to change music selections though, because if you change the music while Chica is happy, then she will leave the kitchen to come get you. Once she leaves the kitchen, there is no way to make her go back.