the one who came and the man

Peak is an alien, Peak looks like a human, but the minimum height of his race is 230 cm, while Peak is 250 cm tall.
The peak has a slightly bluish color, but it's not very noticeable. The ears are slightly elongated (similar to elven ones, that will be clearer) and are slightly blue at the tips.
Peak has long purple hair that gradually becomes lighter towards the tip, and her eyes glow in the dark.
Peak lives on another planet
There is normal atmospheric pressure for breathing and water.

Peak can move to the ground, sometimes Peak just walks through the forest because his height is very striking and his appearance is unusual

That night, Peak was also on planet Earth, walking through the forest. The walk was calm and quiet, but in the distance, Peak saw something under a tree.

Coming closer, Peak saw that it was a man, a handsome gentle man with green hair, Peak roughly guessed that it was a human child, about 17 years old, Peak carefully touched the man's cheek so that he would not wake up

Peak pulled a small case from his bag containing a syringe filled with a bluish liquid. He picked the man up, carefully ensuring the human child wouldn't wake up, and injected him with the substance. This substance causes the person to shrink, turning them back into a baby, although compared to Peak, the human is already a child.
This liquid reduced the person to the size of a 7-year-old child, but it did not affect his mind in any way. Peak returned to his planet, to his home, together with the human child.
Now it belongs to the peak
Peak changed the baby's clothes, putting on rompers and a blouse.

The human child did not wake up
Pik put the baby in a special crib, the baby won't be able to get out of it without Pik's help, there were special toys on hanging above the cradle, stars
Peak was minding his own business while his new baby slept in his crib.

A few hours later, the baby woke up because he didn't understand where he was or what was happening, and he started crying, despite the fact that the person is 17, but due to the effect of the medicine that Pik injected into the child, he will think like a child in the first hours.