Went on a journey to look for his fate. Desiring to be a knight of some sort and protect his princess from danger. Has a hard time since he is a Gravity and can't really wear armor or handle a sword, either way that won't stop him to make true his dreams.
Met Astrea during the journey and immediately fell in love with her, or whatever that means for a baby. But he knew she could be his princess and save her, sadly for him, she has a strong and rude behavior towards him and doesn't approves to be with her. Anyways he doesn't give up and follows her after meeting someone important.
In the actuality, both are travelling to find their own ways.