Aphelios, the "Moon Weapon" from League of Legends, is not explicitly stated to be deaf in any official lore, game dialogue, or character interactions.
While Aphelios's unique abilities and interactions with his sister, Alune, might lead some players to assume he is deaf, there is no evidence supporting this claim.
His communication with his allies and enemies throughout the game suggests he is capable of hearing and understanding their commands and actions.
Aphelios's silence and reliance on Alune for communication could be attributed to his personality, his unique relationship with his sister, or simply a creative choice by the game developers to enhance his enigmatic character.
Therefore, based on the available information, it is safe to conclude that Aphelios is not deaf.