She's a dragon loli! Is there anything else that I have to say?
Nowi, despite her true age, mostly acts like a child, but this is revealed to be a deliberate act to cheer others up which in turn shows how mature she truly is. She loves playing outside and is always looking for a playmate, though she explains to Nah that her constant playing around also serves as her training regimen. Upon joining the army, Nowi immediately understands her cheerful impact on the army and acts accordingly to keep the army's morale up.