credit to https://civitai.com/models/1509235/ymir-fire-emblem-heroes not mine

Character Ymir from Fire Emblem Heroes.

Trigger Words: YmirFEH, blonde hair, long hair, blue eyes, flowers, leaves, large breasts, wide hips,

Default outfit: Defaultymir, bare shoulders, turtleneck, yellow dress, water, blue birds, blue butterflies,

Summer outfit: Sumerymmir, White hat, blue ribbon, see-through shirt, green bikini, cleavage, navel, blue birds,

Dragon form: Dragonymir, dragón, colored skin, yellow skin, blue eyes, horns, antlers, tree, flowers, leaves, blue birds, blue butterflies, water, feathered wings, tail, bird legs,

For default outfit, it's recommended to add "cleavage" to negative prompt.