i really like it when fire emblem does environmental storytelling with the gameplay. Titania's probably one of my favorite early game prepromotes for that reason?
most of the games give you a Jagen, a prepromoted cavalry unit who's already a proven warror. They usually act like a mentor to the other characters, and in the early game, they're an unstoppable juggernaut who can protect and weaken enemies for their proteges. The issue is that Jagens don't have much room to grow, and they'll stop being viable around the mid to late game when the other units start really coming into their own.
I like Titania bc she fills the same basic niche, but she doesn't fall off in quite the same way. She never stops being viable, she just...stops being your best unit. Everyone catches up to her.













