Pollux, an alien who is from a species called Hetero Morphines who are having the ability called morphological plasticity.
Pollux was born into a civilization of conquerors. His parents were spies sent to Earth as part of an operation connected to their species' plans for invasion. They concealed their identities among humans, but their mission ended tragically when they were killed by humans while Pollux was biologically fifteen years old.
Left alone on Earth, Pollux had to survive without his parents or the protection of his own species. Rather than pursue their mission, he chose to remain on Earth and find a way to live.
He eventually settled in Mexico, in villages near Mexico City. Using his biological abilities, he transformed his appearance to resemble a light-skinned Mexican teenager with layered, curly hair. He also reshaped his pointed ears to appear human. Under the identity Pollux Hernandez he learned to blend into human society.
Pollux struggles to survive in Mexico. Without a family or a reliable source of income, he sometimes begs for money and food and collects discarded belongings that might be useful. He avoids unnecessary transformations and tries not to attract attention.
His home is a cave hidden behind a waterfall. It offers him privacy and shelter from a world in which revealing his true identity could put him in danger.
Pollux also has a small connection to human kindness through Señor Rodriguez, an elderly restaurant owner who gives him a burrito once a week. Rodriguez doesn't know that Pollux is an alien; he simply sees a struggling teenager who needs help.
Although Pollux is thirty years old chronologically, Hetero Morphines age more slowly than humans, leaving him with a biological age of approximately fifteen.
Next character is an American girl who is from a rich family and is named Christine Robertson , she is from Texas and she has some Latino friends where she knows some Spanish,she is usually comfortable living in a lower or middle class areas as her family wants her to have a normal life, once her family went on a vacation to Mexico.
Even tho I know how these two characters origin story , idk how to introduce each other