Murasaki Shion (紫咲シオン) is a female Japanese Virtual YouTuber associated with hololive, debuting as part of its second generation of VTubers.

hololive profile:
“Hellshio! Murasaki Shion here!”

A random self-proclaimed child (though she is probably an adult) who appears around the Demonic-Realm Academy. She calls herself a highborne black magician (probably).
She can barely say her greeting, “Hellshio”.