As the dragonet in question likes to remind everyone, he is the elder between the two of them. He will be fine.

"...what is it that you last remember?" He knows that people can be brought here from disparate points in time, sometimes greatly so. He also knows that people can be brought here after their deaths. (Though he doesn't yet know that Hythlodaeus is a special case.)

"They are many and varied. Think of them as you might an adventurer's chocobo. A steed, travel companion, and sometimes a partner in battle."