English

Fire Emblem Heroes: Fjorm Sings - "Flower of Ice"

Japanese

ファイアーエムブレム ヒーローズ フィヨルムが歌う「氷の華」

A music video featuring Fjorm: Princess of Ice singing Kouri no Hana by Hiroki Morishita, a composer from Intelligent Systems. The English version is sung by Cristina Vee Valenzuela, and the Japanese version by Rie Takahashi.

(Source: Fire Emblem Heroes Wiki)