kokkoro (princess connect!)
A character from Princess Connect! Re:Dive (she did not appear in the original Princess Connect!). She also appears in Granblue Fantasy as a special event character.
The official romanization is "Kokkoro", but sometimes her name is spelled "Coccoro" by fans.
She is a short and slender elf with shoulder length silver hair, pink eyes and pointy ears. She usually wears a green and white sleeveless dress, light green detached sleeves, and a hair flower.
In the anime adaptation, she is memetically associated with the :x expression, which she frequently uses (she does not do this in the game.)
Her name in the real world before the events of Re:Dive was Natsume Kokoro (棗こころ).