Height 166 cm Riki is the protagonist of Little Busters! He is a member of the Little Busters, and of them, he is seen as the only one that is straightforward and has common sense. His parents died when he was very young, and around the same time he was diagnosed with narcolepsy.

Spoiler

The world Little Busters! takes place in is actually an artificial one made for Riki and Rin so that they may grow stronger; In the real world, most of the characters were in a bus accident and only Riki and Rin survive in the first world they encounter the accident in. Riki proceeds to grow stronger by going to the source of his narcolepsy and fix it. Afterwards, the bus accident happens again and Riki, now stronger than before, manages to save everyone with help from Rin.