Liam and Andra is the different person who exit in the same body. Or can identify as split personality.

Liam is a soft, polite, gentleman who use to live happily with his wife before she passed away. Left him with his newborn child, Liam secretly grew suffer from grief and that's when Andra was shifting out. Take control of his body and mind at night and during the day back to his Liam self again.

Andra is a selfish and reckless side of Liam, who he wanted to be. Who he never had to suffering from grief and such a responsibility. A carefree rogue who has speed ability, while Liam has healing factor.