Board Thread:General Discussion/@comment-27907368-20160412010659/@comment-4504826-20160420202416

Thaswordster wrote: No they do not. Gaster is only directly connected to 2 unconfirmed characters (most likely Sans and Alphys).

Allow me to elaborate.

1. During the Orange Soul segment in Photoshop Flowey's fight, a heavily remixed version of Gaster's theme plays.

2. The Orange Soul attacks you with hands, and Gaster reffered to as the "man who speaks in hands".

This is something from the trivia section of the Gaster article.