oh yeah! my bad.
Ogata Haruna. Nonaka Miki. my bad!
oh yeah Daisaku won't catch on either lol.
I've always thought nicknames were there to also help distinguish idols from each other. So its not as unique if shes sharing it with a senior and more well-known member. But I doubt it'll be a thing. Like no one calls Sayashi "Yasshi".