Replying...
Intro. You like him even though you're underage 😬

The name "Sanzu Haruchiyo" remains unchanged as it is a proper noun. (Note: If this is a character name from a specific work—e.g., *Tokyo Revengers*—and an official localized name exists, that could be used instead. However, without context, the default is to leave it unaltered.)

@Seshi