Liver

Liver was the leader of Esdeath's personal bodyguards and the strongest group in her army, known as "The Three Beasts". He was a refined and battle-hardened man, who was deeply loyal to Esdeath.

He once was an accomplished General in the Empire's army and Bulat's superior years ago. During the Empire's war against the Southern Lands, he was dismissed from his post due to being framed on false charges when he did not give in to the Prime Minister's bribes. At the military tribunal he attempted to valiantly defend himself using his records and merits, but it fell on deaf ears.

After ultimately being left to rot prison for the rest of his life Esdeath appeared, and in a surprising move she freed him on the condition that he would join her army. She valued his abilities and achievements, thinking that it would be a waste to leave him imprisoned. Esdeath also offered him patronage against the Prime Minister and his other enemies. Grateful for being saved and granted a new life back in the military, he became indebted to Esdeath, leading some of her most loyal men. When he and Bulat met once again for the first time in years on the cruise ship "Ryussen" with their paths in life having diverged, they battled to the death with their loyalty and ideals on the line.

(Source: Akame ga Kill! Wiki)