The Cameroonian is expected to complete his move to the Blaugrana in the coming days and his former international team-mate praised the physical attributes of his compatriot.
"Song is a beast on the pitch and he's also gifted technically. Without a doubt he'll improve Barca, who at the moment are looking like more of a team than Real Madrid," Kome said to COMRadio.
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"His best quality is his ability to create goals with his passing. He'll compete for a place in the starting line-up, I'm certain of that. He can play in the middle of the park but he can also play at centre-back, no problem."
Kome continued by affirming his view that the 24-year-old midfielder will provide a positive personality in the Camp Nou dressing room.
"He's got a special personality. He creates a lot of atmosphere in the dressing room, but he never causes any grief.
"He's always got a smile on his face and he never had a fall out with anyone in the dressing room at Arsenal."
Song is expected to undergo a medical at the Catalan club on Monday before signing a five-year contract with Tito Vilanova's side.