Halaholo was born in Auckland, New Zealand, to parents of Tongan descent, but has represented Wales internationally after becoming eligible to play for that country on residency grounds.
[1] It was while playing for Suburbs that Halaholo caught the attention of Southland selectors and he headed to New Zealand's far south to gain his ITM Cup break with the Stags in 2013.
[4] Stuck behind the All Blacks midfield combination of Ma'a Nonu and Conrad Smith, Halaholo made only three appearances off the bench for the Hurricanes that season.
[12] Halaholo was named in the 2007 New Zealand Secondary Schools team alongside future All Blacks Tawera Kerr-Barlow, Elliot Dixon and Charlie Ngatai for their tour of Australia.
[15] Following injuries to fellow midfielders Johnny Williams, Jonathan Davies and George North, Halaholo was recalled to the Wales squad for their 2021 Six Nations Championship match against Scotland on 13 February 2021.