Sasamori has short spiky dark brown hair and brown eyes. he also has freckles right under his eyes.
When in Trigger Mode, he wears a jacket with black lines around the Borders and white lines running through the sides of the arms and around the collar, like the rest of his unit. He also wears headphones around his neck. He also wears a lime green shirt under his uniform.
Sasamori is generally nervous and diffident, often seen sweating. He is deeply affected by the opinion higher ranked agents, such as the members of the Kazama Unit, have of him.
- (To Sōya Kazama) "But... I can't simply withdraw...!"
- (To Kōtarō Suwa) "That's the strategy where I also get blown away, right?" 
- He likes fried rice, croquettes, and manga.
- According to himself, apparently he is frequently used as a bait by his team mates.