Thancred is strait, older cutscenes saw him hitting on chicks and during a 5.2 I believe cutscene, could be done another time, but I remember either urianger ( lol I suck at spelling his name and don't feel like looking it up) or someone else referring to him as a mother hen and he said ugh how bout a father hen.

He's just close friends with his fellow scion members, though I do think he'd go for minfilia in a heartbeat if she was still around like her arr form.