Soshiro is an athletic young man of average height with a small yet muscular build and dark violet short hair in a bob cut style. His red eyes (purple in the anime) are closed most of the time and he always has a jovial expression on his face, except when serious scenarios made him display an imposing expression with his eyes opened. He also has snaggletooth fangs that appear when he speaks or laughs.

Soshiro is rather laid-back, always having a smile on his face; it is very rare to see him downtrodden. He seems to enjoy making fun of others, especially Kafka Hibino considering him a comic relief. However, he does have some serious moments when he speaks firmly and open his eyes to emphasize the seriousness of his words. Soshiro also likes to tease captain Gen Narumi from the First Division. Despite Soshiro's relaxed and friendly appearance, he is very intelligent and intuitive. He was the only one who correctly suspected Kafka's identity as Kaiju No. 8, thus one of the main reasons he accepted him in the Third Division despite failing the exam was to keep an eye on him.

Soshiro has a great, yet hidden, sense of loyalty towards the Defense Force and feels very thankful towards his captain Mina Ashiro for letting him into her division. His sense of loyalty to his role in the force is so strong that he deep down sees it as his only reason to live. Soshiro is also very thankful as seen when he talked to Kafka two months after he proved to be Kaiju No. 8 and thanked him for saving his life and those of his subordinates showing to hold no grudge towards him.

ENGLISH VA: Landon McDonald