The sound Thor makes is less a laugh and more a snort of dismissal at the very idea of trying. The tension in his shoulders relaxes a little, once she confirms she's on his side of this, though he doesn't fully let down his guard. By the Norns and all the Nine, why can't things ever be simple and straightforward for once?

He clasps his hands together to try to keep himself from endless, restless fidgeting. It doesn't work, exactly, but it helps a little. "I've seen little good come of keeping secrets, even the less obvious ones. Whether they are kept in good intentions or not. Tradition is worth honoring, but if it's not practical or possible, shouldn't there be exceptions?" It's a problem he's sure Asgard will need to address in the coming years, integrating their ways with those of the humans, adjusting to more primitive technologies and alien customs in their new home. They will have to decide what is worth keeping, and preserve those traditions that still dwell at their core, but they cannot follow in the exact footsteps of their ancestors any longer.

Steve won't know who he was, where he came from. But if the essence of the man that Thor knew remains, he's damn well not going to be content leaving a mystery like this untouched.