It could be an old and wise Magi who has heard legends about the Cave of Wonders all his life. He decides to finally enter the cave in his twilight years, believing he can unlock its deepest secrets. His knowledge of Magi lore would be his greatest asset, but his age might also pose some physical limitations as he traverses the cave.
A female Magi who is an outcast in her society could be the main character. She sees the Cave of Wonders as a chance to prove herself and gain acceptance. Inside the cave, she discovers powers that are different from what is traditionally accepted in her Magi community, which leads to a conflict between her new - found self and the expectations of her people.