>FRIEND came from an egg in noelle's game
>5 eggs (implied by forgotten man's hints stopping after chapter 5)
>the shadow mantle summons 5 FRIENDs at a time
>5 cat shapes on amalgamate FRIEND's silhouette including the head
the eggs are putting FRIEND together
the first 4 eggs are the 4 cat shapes on the bottom
the 5th and final egg, collected in the Field of Pink and Gold, is FRIEND's head and face, of course including his pink and gold eyes
gaster considers the eggs an "issue" because you're following the pointed tail by seeking them out

>>3809561
the eggs are putting FRIEND together
the first 4 eggs are the 4 cat shapes on the bottom
the 5th and final egg is FRIEND's face
hence chapter 5 being the field of pink and gold
gaster considers eggs an issue because seeking them out is following the pointed tail