Charlie was surprised by the news that his father along with Hyperion were missing. This required the attention of the demi-titans and he would have to partake in the quest, even though he hated the idea of having to work with the demigods and the Egyptians. But if his dad was in trouble then he owed it to him and Charlie's mother to help him out of it.

"The demi-titans will also show support in this quest, and since i am their representative then I shall partake in this quest" he said to Morpheus with his arms folded. he tried to not show an annoyed look on his face, but it was difficult and could almost see how annoying this quest would be.