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New Year's Laegjarn
Our next Tempest Unit, so I already like this one.
So, her base kit suggests she's meant to support. I like this because support units are my favorite type of units.
Her natural weapon has Chill Def in it, and her Natural B skill is Chill Res 3. Definitely wierd, but it can potentially be used to the teammates' advantage. Def Tactic in the C slot is nice, likely the 4 star skill. Pivot, I'm not liking, definite switch.
So for a likely budget support set: (for me)
Default Weapon with Speed refine
Reposition
Moonbow
Likely Fury, but idk
Chill Res
Def Tactic
Res Tactic seal
You could make her into a real nice offensive unit or duelist if you wanted, tho. She has the statline for either.

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