Eren is a strange young boy, although he's not young under human standards. We are not sure to what race he belongs, small like a dwarf but agile as an elf.
Vismir is a powerful mage in search for quests, haunted by his past. Sometimes he's not in his right mind.
Phyra is a special kind of bird. She's a race of "Phoenix", although she doesn't need to die to burst into flames.