Irritable ghost
What have I got to say to YOU!? Nothing!!
Like I'd even recognize a pathetic face like THAT!Irritable ghost, Chapter 2
Irritable ghost is an unseen Lightner in Deltarune, residing within the Blook house in Hometown with the nobody and Napstablook. They are presumably the counterpart of the ghost that inhabits the Mad Dummy/Mad Mew Mew in Undertale, sharing their angry temperament and tendency to repeat words three times in escalating volume.
Irritable ghost is short-tempered and abrasive. They are quick to anger and express their frustration through loud, escalating outburts. Despite their hostile demeanor, they occasionally appear flustered when caught off guard as seen when asking Kris to say hi to Asgore for them.
In Chapter 2, irritable ghost is heard from the other side of the nobody's door, irritated that the knocker might be looking for Napstablook, who is not there at the time. If Kris answers they are looking for irritable ghost, they call their face pathetic, and let slip that they should say hi to Asgore for them. If Kris answers they are looking for "Someone Else", they can speak with the nobody.