How about Hinata and Zoë? Hinata is shy and gentle, while Zoë is bold and curious. In a fanfiction, their friendship could develop as they explore the strange new world that combines Naruto's and Beyond Two Souls' elements. Hinata could learn to be more assertive from Zoë, and Zoë could gain a deeper understanding of loyalty and friendship from Hinata.
Another interesting pairing could be Naruto and Aiden. Naruto's positive energy and determination might contrast with Aiden's more shadowy and vengeful nature. In a fanfic, they could team up against a common foe, and Naruto could try to bring out the good in Aiden, leading to a transformation in both characters.
One possible unusual pairing in Naruto and Beyond Two Souls fanfiction could be Sasuke and Jodie. Their personalities are so different. Sasuke is brooding and focused on revenge, while Jodie is more empathetic and in tune with the spiritual side. Their interactions could be full of tension and growth as they learn from each other.