Yumina Ernea Belfast

Yumina Ernea Belfast is a key character in In Another World With My Smartphone. She is the crown princess (and later first queen of Brunhild Dukedom) of the Kingdom of Belfast, and the first fiancée/wife of the protagonist Touya Mochizuki.

Appearance: She has long blonde hair reaching her chest and distinctive heterochromic eyes (one blue, one green) due to her special Mystic Eyes of Intuition, which allow her to see a person's true nature or personality.

Personality: Yumina is polite, kind, cautious, and embodies the ideal of refined royalty. However, she can be surprisingly bold, proactive, and direct in her actions—especially regarding her feelings for Touya, whom she falls for quickly and pursues assertively.

She is skilled in archery, magic (particularly wind, earth, and dark affinities), and is generally mature, considerate, and open to sharing Touya with others in his harem setup.