Aoi is a playable character from Dragalia Lost.
A cheerful and devoted ninja from another land. Such joy is unusual for one in her line of work, but she also carries deep emotional wounds. Per her master's last request, she's come to the castle in search of a new person to serve.
Official Description (Wedding Aoi)
Aoi is practicing so-called "ninja bride" skills in a Hinomoto-style wedding dress. Her new outfit isn't ideal for living in the shadows, but it opens up a number of intriguing possibilities. She's set on wearing a similar dress at her own wedding.