Dexter

A boy with a higher IQ than others, red-haired (or orange-haired), with blue (or light blue) eyes and eyelashes and eyebrows the same color as his hair, thin, not very athletic, and always conducting research and experiments.

He is somewhat serious and does not like to show much affection or feelings other than something like happiness for his achievements, anger, seriousness and sarcasm. He is currently 21 years old