Itachi and Sasuke.

Itachi Uchiha Itachi was a quiet and insightful child from a young age, and showed unusual maturity for his age, as well as knowledge of how to act in any situation. At the same time, Itachi sometimes showed the naivety typical of children in many everyday situations, so he willingly learned from his peers. Itachi lived at a distance from others, observing people and evaluating various ideas, trying to fully understand them and not taking anything on faith.
Little Sasuke Uchiha admires his brother, but worries about the lack of attention from his father. Fugaku spends all his free time with his eldest son, teaching the teenager the clan's techniques. But the younger child does not arouse much interest in the man. At the age of 7, the talented kid enters the Ninja Academy. The boy has a great responsibility - not to disgrace the name of his native clan and to surpass his older brother, who graduated with the highest marks.