Sione Fainu (born 4 July 2001) is a Tonga rugby league footballer who plays as a prop for the Wests Tigers in the National Rugby League.
He is the brother of fellow rugby league players, Manase, Samuela and Latu.
In Round 11 2024, during Magic Round, Fainu made his NRL debut against the Dolphins at Suncorp Stadium in a 24–12 loss.
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