The 21-year old comes into the Valkyrie squad having recently spent time in rugby union, where she gained county honours playing for Yorkshire.
A former Leeds Rhinos Academy player, she made her Super League debut in 2021, before suffering an ACL injury. She returned to action the following season, making four appearances in total for Lois Forsell’s side, and scoring one try.
York Valkyrie Director of Rugby, Lindsay Anfield said: "Adaoha is a great signing for this point in the season.
"She adds experience and pace to our back line, as well as a strong knowledge and understanding of the game.
"We are looking forward to seeing her in a Valk shirt this year."
Akwiwu could make her debut this weekend in the Women's Nines Festival.
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