Langa has been snowboarding since 2yrs old but after his fathers death he moved to Okinawa with his mother where he meets Reki, and rediscovers his passion for sports through skateboarding.

Yamaguchi is a pretty shy person who relies on others. Though he is generally a nice person, he tends to snicker along or join in with Tsukishima whenever he's mocking others. He is hardworking, as shown when he sought for extra training on his own, and how he continued practicing outside of the team after seeing how weak he was compared to his other teammates. (Source: Haikyuu!! Wiki)