How do the memoryheads remember gaster
If any of the amalgamates where to remember the goop man it would be the memory heads. It just makes sense. haha~
But anyway, in the comic those guys are the amalgamates that Gaster actually had a hand in making. By accident as they all were.
And a little fun fact for you:
It may be hard to see depending on how/where you see the comic, but I did give each one a different color. A very slight color. One blue (right), one teal/green (top), and one magenta/purple (left).
The magenta one is also the one that Hachi, Hana's husband, ended up being a part of.
You can kind of see a bit more of him in this one (The one most to the left.)
I like to think of the memory heads as being the oldest amalgamates because of how melted/ far gone they are. So in my comic, I also put seeds all over them. Gaster was the one who was doing the experiments with the flowers in my comic. And these memory heads are the results of the "accidents" that Alphys described. Gaster had used a different ratio of Determination than Alphys did. This is also why the memory heads are pretty much just goop.
All of this just to say: The memory heads remember Gaster because of their name.