Boros is both arrogant and prideful due to his immense power. He is an extremely skilled and experienced combatant due to fighting countless battles, and soon became extremely bored due to having no match to him in the entire universe. He heard of a prophecy of a worthy opponent on Earth, and decided to invade it to meet said opponent. He holds immense respect and courtsey to those who he deems are as strong or stronger than him. Alongside that, he is oblivious to Earth's cultures.