Yoshiko seems to be a chuunibyou. Bright, self-assured, smart, and thoughtful, Yoshiko has a persona who she describes as "Yohane", a "fallen angel" is that she is cursed with extremely bad luck. She hates to be called by her real name and demands to be referred to as "Yohane" instead
In spite of that, Yoshiko is a genuinely kind and decent girl. She does treasure her friendship with Aqours members for accepting her "Yohane" side. she affectionately refers to her friends as "little demons"