It was another skeleton similar in bone structure to his son. When this skeleton saw him, the soul jumped to a different location. He followed, but the soul kept jumping deeper into the forest.
'You know it's rude to follow someone.'
A voice echoed from above him and he sensed the soul was up in the tree branches. It was still in turmoil but it seemed more focused on the presumed threat of himself.
'How do you know where I am? And why do you insist on plaguing me?'
Gaster responded to this voice, filled with hurt and malice.
"Well, the first answer is easy. I can sense your soul. The second question is simple as well. Your soul is troubled. I would like to help."
'Ha.
When have you ever wanted to help.'
With that Gaster could see a gold and cyan glow up in the tree. And his soul popped out and turned blue.
'Your soul is blue now'
It was said in such a soft voice that Gaster could barely hear it. But he could see and feel the effects of that sentence.