YoshiP “Torn" Over What to do with the Scions (Interview)

[Gaddes]

Thancred is nothing like Urinager

Opposites attract....
All jokes aside, it's been pretty well established since Shadowbringers that the two of them had been around each other the most compared to other Scions... from their time raising Ryne together in Il Mheg to the Eden raids and beyond. I actually think they pair rather well, as they're both more settled down now in their older age and are complements for one another. It's pretty natural for people to get along and not be exactly like their friend/partner. I'm certainly not like my husband, lol.
Estinien has quite the history of working alone unless it's the WoL in an unusual circumstance or when he has a more personal investment (like Vrtra), so if anything him and Thancred pairing up would be the odd thing to see.