Usami Renko Hentai: Próifíl Carachtar & Bailiúchán

A Touhou character. A friend of Maribel Hearn who lives in the outside world. Has the ability to tell location and time by looking at the sky. Her connections to Usami Sumireko are currently unknown, but their identical surnames indicate a possible familial tie. (Source: Danbooru Wiki)