Yonas Kibreab Elio / Other Elio (voice) Zoe Saldaña Olga Solís (voice) Remy Edgerly Glordon (voice) Brandon Moon Ambassador Helix (voice) Brad Garrett Lord Grigon (voice) Jameela Jamil Ambassador Questa (voice) Young Dylan Bryce (voice) Jake T. Getman Caleb (voice) Matthias Schweighöfer Ambassador Tegmen (voice) Ana de la Reguera Ambassador Turais (voice) Atsuko Okatsuka Ambassador Naos (voice) Shirley Henderson Ooooo (voice) Naomi Watanabe Ambassador Auva (voice) Brendan Hunt Gunther Melmac (voice) Anissa Borrego Ambassador Mira (voice) Shelby Young Diplo Ship (voice) Bob Peterson Universal Users Manual (voice)