Currently, he is a libero on the V. League Division 2 team Hiashi Automotive Lions.
He has an undercut with dark brown, spiked up hair, dark brown eyes and thick eyebrows. Due to the slant in his eyebrows, he unintentionally looks to be glaring. He is relatively short and has a medium build.
He is serious and focused on the game. When Nishinoya pulled off an incredible move, Yamagata grinned widely. It's been shown he is similar to Nishinoya when it comes to 'getting into' the game, yet he seems more aggressive than most liberos.
Yamagata is also seen being very supportive of his kouhai, Goshiki, and was shown telling Ushijima when he was being unintentionally rude towards him. He appears to be very protective of the younger years and often acts as a mentor.
Spring High Preliminary ArcEdit
As a libero, he seems to be good at receiving. Because he is in Shiratorizawa, he must be pretty skilled to become a regular.
Jumping Reach: 305 cm
- Favorite Food: uni donburi (sea urchin on rice).
- Current Concern: He keeps forgetting where he put his phone.
- His star sign is Aquarius.
- Despite being a third-year, his jersey number is 14. The reason for this has never been revealed.
- The Shiratorizawa third years are seen eating lunch together, yet Yamagata is the only one not present.
- He shares his first name with Hayato Ikejiri.
- Hayato (隼人) - "Falcon Man" (as in The Hayato People)
- Yamagata (山形) - Shape of a mountain