Luai was an eight-year-old on a family camping holiday when Marshall led Wests Tigers to the 2005 NRL grand final title.
“Our camping neighbours happened to have a little portable TV, so we watched the game on it,'' Luai, 24, told Australia's News Corp.
“I remember my mum got me a Tigers towel afterwards, and I used it after every shower for the next five years – I just didn’t want to let go of it.
Luai - who is Sydney born with Māori and Samoan heritage - is a NRL star in his own right, having helped the Panthers make the 2020 grand final.