Belicho Paenymion is a prominent noble of the Free City of Volantis, and a member of the "Old Blood", descendants of the original Valyrian settlers of the city. Like most of the Volantene nobility, Belicho is involved in the slave trade.
Belicho, along with Yezzan zo Qaggaz and Razdal mo Eraz, is a member of the delegation that visits the Great Pyramid of Meereen to negotiate with Tyrion Lannister and Varys, who are ruling the city in Daenerys Targaryen's absence. While the slavers offer Dany a pot of money to leave Slaver's Bay, Tyrion proposes a counter-off that the slaving cities outlaw slavery within seven years and that the slave owners be compensated. The slaving cities accept Tyrion's pact but later break it by launching a naval bombardment of Meereen.
After Dany returns, Belicho along with Yezzan and Razdal meet with her and her advisors to demand her surrender. They offer to allow Dany and Tyrion to leave Meereeen unharmed in return for the return of Missandei and the Unsullied and the destruction of her dragons. Dany however rejects their offer and demands their surrender. She orders her dragons Drogon, Viserion, and Rhaegal to burn the slaving cities' fleet in the harbor. In Dany's absence, Grey Worm convinces the slave masters' bodyguards to abandon their masters. Missandei demands that the masters surrender one of their own to be executed. Belicho and Razdal try to save their own skins by offering Yezzan. However, Grey Worm, with Tyrion's approval, cuts the throats of Belicho and Razdal for their opportunism instead.
Belicho was a slave master who represented the Triarchs of Volantis in negotiations with Tyrion Lannister, who ruled Meereen in Dany's absence. In order to reinstate slavery outside of Meereen, Belicho agreed to Tyrion's proposal to stop funding the Sons of harpy. Instead, he helped the other masters attack Meereen and was executed once Dany relook the city.