ABLE / ABEL / HAVEL TV TROPES
Always Second Best
Angsty Surviving Twin
Cain and Abel
Driven by Envy
His Own Worst Enemy
I Just Want to Be Special
The Resenter
Sibling Yin-Yang
Alas, Poor Villain
The Berserker
Blood Knight
Blue-and-Orange Morality
Fallen Hero
Misantrophe Supreme
probably hard to read on pc.