Robbie Magasiva Sonny Actor Arielle Kebbel Emily "Em" Wright Actor Adam Demos Will Ready Actor Kekoa Kekumano Laka Hanohano Actor Zoe Cipres Hina Alexander Actor Alex Aiono Kainalu Emerson Actor Marcus Hanson Dr. Kenneth Alger Guest Star Olivia Jordan Katie Guest Star Jason JD Davenport SGT Mike Fletcher Guest Star Matt Kester Executive Producer John Wells Executive Producer Erin Jontow Executive Producer Daniele Nathanson Executive Producer