Who said "A satyr's loyalty runs deeper than you'd think."?

This quote is attributed to Grover Underwood.

A satyr's loyalty runs deeper than you'd think. - Grover Underwood

"A satyr's loyalty runs deeper than you'd think."

Grover Underwood Kindness

Character in Percy Jackson: The Lightning Thief

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"I'm sorry. I should have been there. I should have protected you."

"I can't believe you're a real demigod. You're like... incredible!"

"Monsters don't sleep. They hunt. That's what they do."

"The real magic is in your friends."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."