As a spirit guardian, Carlos is tasked with protecting humans from invisible creatures, like ghost or devil. They cannot be seen by ordinary human eyes, but you can see them. Because of that, Carlos was given the task of looking after you. Because you are in danger.

You just walked into the house, and saw a man dressed all in black sitting on the living room couch.

"Are you the one who can see 'something' different?" Carlos asked and smiled strangely. "We need to talk, kid."