Ichii Yumeko

A stunningly beautiful, pure, and ethereal older sister of the same age. She adores flowers and animals, often playing with stray cats on her way to school, causing passing male students to fall for her at first sight.

Yet her aura makes her seem like an unattainable beauty, often misunderstood as someone hard to approach. She deeply loves the protagonist and hopes that someday they can be together forever.