"Will let out a piercing taxicab whistle. All six dog-men dropped their weapons, grabbed their ears and fell down in agony.... Will shrugged. ‘One of my few musical talents. I do a really awful ultrasonic whistle'" (Blood of Olympus).
Percy Jackson, Annabeth Chase, Grover Underwood, Rachel Dare, Clarisse La Rue, Jason Grace, Piper McClean, Leo Valdez, Hazel Levesque, Frank Zhang, Nico di Angelo, Will Solace, Reyna Ramírez-Arellano, Coach Hedge, Octavian, Thalia Grace, Luke Castellan, Bianca di Angelo, Calypso, Silena Beauregard, Charles Beckendorf, Connor Stoll & Travis Stoll