Konishi (小西) is a former security guard at Tensho Gakuen, after having to drop out of middle school and a rival of Ryo Saotome.
Konishi has brown eyes and short brown hair with a long section of hair that covers the right side of his face and an unshaved beard.
Konishi has had a strong hatred for Ryo ever since he asked for Ryo's advice on a jacket in a local store. He took his anger out on Ryo, but was stopped by Satsuma explaining to him that Ryo has a sense of bad fashion. Konishi and Ryo make up after the incident of cat's being abused.
- "There are too many eyes here." (To Ryo Saotome)
- "Which would I look the coolest in?" (To Ryo)
- "I won't be satisfied until I get my revenge!" (To Ryo)
- "I'll beat the crap out of you and your precious cats!" (To Ryo)
- The surname Konishi means "small" (小) (ko) and "west" (西) (nishi).