In Ruca's case, it's mostly him remembering how he got killed in his previous life by the person he loved the most. Though he did decide that it didn't matter, because in this life everybody is no longer the same they were in the past. His resolve is to focus on the future.

Oh, that sounds so nice, yes! He's definitely going to be wary of motorcycles because he comes from a steam-punk like world. The best they have when it comes to vehicles are steam trains, steamboats and airships, so he's not used to things that can be faster than that haha But if he's taken good care of, I'm sure he'll be fine! He definitely likes learning new things and enjoys travelling by boat and by the airship.

And sure, please do! I'll be looking forward to it :D