Responses
He's 19. He became a Duke before he was 10. This isn't romance, so age doesn't matter. They both have a desire to protect the other. It's been a long time since I've read the original, but I feel like she made comments that she lost her life when she was young, so there was no time for romance (since she was a battle saint).

Homie y u fallinv in love with a six year old ┑( ̄Д  ̄)┍