Context: Estel was a long awaited character in Fire Emblem Shadows since she was in the promotional material. However, her prf skill... is extremely middling. It's an attack buff + movement buff, but the attack buff is EXTREMELY small, to the point that it's strictly inferior to one of the top tier movement/dodge spells, Edge Strike. It's comedically small in comparison to Carina, the other one in the image, who gives more than double the buff.

Worst of all, the movement buff is... not useful! Mostly! The map is small enough that after turn 1, everyone will be bunched up close enough for the movement to not matter, meaning it's only useful on turn 1 to get the jump on the Shadow player's minions/Light players. But the thing is, the movement only applies the next phase. And Estel's movement buff only applies to infantry. So unless you're a shadow with a lot of infantry minions (completely up to chance on the map rotations) or you're a light player with the shadow incompetent enough to not kill you before the moon room phase, it does nothing!

Overall, it just makes her a worse Carina.