Potential structure: Introduction, role in the story, interactions in chapters 1 and 2, character traits demonstrated, significance. Need to highlight key scenes where his personality is shown. Maybe in chapter 1, he's introverted, and in chapter 2, he overcomes a small challenge due to his otaku knowledge.
Masaya felt a hollow ache in his chest, like a room where a window had once been. He didn’t know why tears were running down his face. He didn’t know why he whispered, “Goodbye,” to the wind. -Toguchi Masaya- Wotome Haha Ch. 1-2