Casi, known as Charu in Japan and Europe, and in PlayStation All-Stars Battle Royale in all regions (チャル), is a computer program that takes the form of a human girl. She appears to help out whenever she can or assists the Professor.
Casi is a pale-fair skinned girl originally with big violet eyes that became green over time, and long flowing green hair usually worn straight down or in a ponytail.
In Ape Escape, Casi wore a black spandex outfit with white cuffs below her shoulder and around her neck. She also wore white socks with red, white, and black shoes, two red bracelets, and a pair of red and white circled ear pieces.
In Ape Escape: Pumped & Primed, she wears the same outfit, but now has a spider motif.
In Ape Escape: Million Monkeys, she wears a sleeveless white shirt with blue short shorts.
Casi is a helpful girl who appears to be formal with others. She is a nice, but quiet girl. She is a loyal assistant to the Professor and is also not quite as pushy as Natalie.
Ape Escape/Ape Escape: On The LooseEdit
Working at the Professor's lab, she helps Spike travel through time by giving him instructions on how many apes he has to catch. She also displays the level titles and how many monkeys are in these stages.
Ape Escape: Pumped & Primed Edit
Casi appears to join the Hi-Tech Tournament along with Spike, Natalie, and the Professor. This in turn, makes her a playable character. After the final battle they had with the Grid Core, Casi helps everyone escape from the world the Grid Core trapped them in. They all arrived back in the normal virtual world safe and sound.
Ape Escape: Million Monkeys Edit
Casi appears in Million Monkeys.
PlayStation All-Stars Battle Royale Edit
Casi appears in PlayStation All-Stars Battle Royale. She alerts Spike and the Professor about an otherworldly invasion during Spike's Story Mode. She's also seen in the Time Station level.
- Although not being present in Ape Escape 2, Jimmy can unlock 4 bonus sketches of her.
- The name "Charu" originates from the word 'bacharu', a wasei-eigo of 'virtual'.
- Casi is called "Charu" in PlayStation All-Stars Battle Royale. This makes it the first time that an Ape Escape U.S. name was called by it's Japanese name.