Lucifer fans will meet one of Ella’s friends when onetime House doc Charlyne Yi guest-stars on the Fox drama. Just don’t expect Chloe or anyone else to lay eyes on the bestie.

TVLine has learned that Yi will appear (so to speak) as Ray-Ray, one of forensics whiz Ella’s oldest friends. The gals get along great, though their relationship is fraught with drama due to one teeny, tiny issue — Ray-Ray is a ghost, invisible to everyone but Ella.

Update: This “standalone” episode will be filmed this spring, but is being saved for (the potential) Season 4.

RELATED Matt’s Inside Line: Scoop on Lucifer Season 3’s ‘Big Finish’

In addition to her run as House‘s Dr. Chi Park, Yi’s previous TV credits include Love, Twin Peaks: The Return, Jane the Virgin and voice work on shows such as Steven Universe.

Lucifer resumes Season 3 on Monday, April 16, with Episode 20.

Want more scoop on Lucifer, or for any other show? Email InsideLine@tvline.com and your question may be answered via Matt’s Inside Line.