Why is he called “the leader”?

That’s why we call only ‘him’ a “leader”.

Modesty, morality, courage, not speaking useless words, considering duty as an eye, considering death as dust, love, family, life partner, living in harmony with nature, maturity to accept pleasure and pain equally, appreciation of virtue, peace, fairness, simplicity, honesty, not speaking from the inside and outside, thinking and acting, prioritizing morality over pleasure, controlling the senses, calmness that is not disturbed by anything, not participating in stage speeches, dealing easily with everyone, not wasting time, not violating justice, promptly giving a reward or punishment according to one’s actions, hating praise, observing closely, far-sighted vision, clear thinking, doing what has to be done without worrying about what others will think, not engaging in unnecessary arguments, respecting women in particular, becoming a child for the sake of children.