First we have Yasuo, the starlight swordsman who hunts demons for a living. He's serene, elegant and kind hearted, but struggles to connect with people and largely spends his time with his creature friends:
Next we have Hatsu, aka the roaring serpent. She is a sassy but compassionate river dragon and life long friend of Yasuo's helping him hunt demons. She love to munch on bitter and toxic plants (which she can easily handle):
