Scarlet is a former student at Haven Academy.
Scarlet is currently a student at Shade Academy.
Scarlet is a member of Team SSSN. During Sun's absense during Volumes 4-5, Scarlet took the helm as a temporary leader to his friends.
When Sun reveals Blake Belladonna's Faunus identity to Neptune Vasilias, he makes his teammate promise not to tell Scarlet at the first chance he gets, implying a lack of trust towards Scarlet regarding secrets.
Following the Fall of Beacon, Scarlet's relationship with Sun strained, with Scarlet having taken temporary stewardship as the team's leader. He is angered by Sun's abandonment of the team during Volumes 4 and 5, and is the first to loudly make his resentment clear to Sun.
As Sun asks Neptune not to tell Scarlet his secrets the first chance he gets, it is implied that Neptune and Scarlet have a close relationship.