BUR #31320 has been approved by @nonamethanks.
create alias niikura_(city) -> ayumu_niikura
Her name is confirmed to be Ayumu Niikura. Her name also doesn't really seem ambiguous enough to require a qualifier, a Google search gives you an entire page with links related to the character.
https://en.wikipedia.org/wiki/City_(manga)#Mont_Blanc_Trio
https://anilist.co/character/127011/Ayumu-Niikura