Sinmara

Sinmara is an Axe and a weapon skill exclusive to Surtr in Fire Emblem Heroes. It increases Defense of the user by 3 and deals 20 damage to all enemy units within 2 spaces of Surtr at the start of each phase phase.

Etymology
Sinmara is a female jötunn in Norse Mythology. She was commonly depicted as a consort of Surtr. She is also said to be the keeper of the legendary weapon Laevatein.