He is always grumbling about trivial things, it's really annoying.

He justified his actions by saying, 'In victory you are the government army, in defeat you are the rebel army.'

He lost the match, but through that experience, he won the game of self-growth.

This equation has homogeneity.

Solving a linear equation is difficult.

Keijiro is my best friend.

Sennenji is my best friend.

He always sticks his nose into other people's business like a busybody.

He was affected by secondary effects.

He enjoys derivative works of anime.