Fein chose the absorption ability as his evolution option for several reasons. Firstly, he understands the value of knowledge and experience. By absorbing the abilities of his opponents, he can learn from them and gain insight into their strengths and weaknesses. This allows him to become more versatile and adaptable in combat, which is essential when facing powerful opponents.
Secondly, Fein is a strategic thinker. He knows that the absorption ability can give him an edge in battle, especially against opponents with unique and powerful abilities. With the absorption ability, Fein can level the playing field by acquiring their abilities, and potentially turn the tide of battle in his favor.
