Remember, these are my personal headcanons, and aren't actual canon (or at least not confirmed)!

Techno is asexual and aromantic (ace/aro)

Techno can shapeshift into his Piglin form if he spends too long in the nether

Techno spends most of his time in his human form bc he can do more stuff in that form (turns out you need thumbs for a lot of things)

Techno's parents were killed by Hoglins

Techno has his piglin ears, tail, and tusks in his human form

Techno secretly hates the cold, but he stays in the tundra bc he's by himself for the most part and he hates being in his piglin form

Dream is the reason how Techno found out that he was ace/aro