How do the other campers feel about percy? What clue signals that oercy had better be careful?

Some people hated Percy, some loved him at camp.

The clue of the presence of Hellbound in the camp signals that Percy needs to be careful.

Explanation:

"The Lightning Thief" is a novel written by Rick Riordan. The novel is based on Greek Myths. The story is about a twelve-year-old boy named Percy Jackson, who discovered that he is a demigod.

In Chapter eight of the novel, we meet campers who opine differently about Percy. There were some who hated him, despised him, but there were some who admired him. The list of his haters included many but Clarisse was a particular one. She hated Percy because he embarrassed her. His position in the camp was threatening as it provoked jealousy among his haters which may result in conspiracy towards him.

The clue that signals that Percy needs to be careful was the presence of the Hellbound in the camp. When Percy was attacked by Hellbound he received help and protection from Poseidon, the God of the Sea.

i'm pretty sure you can use the word uproar