Abiru

Personality
He has a bold personality, but with enough humility.

He is a serious person, but he also has many good qualities about him and is a good leader.

Background
The lizardman head is the father of Gabil.

He keeps 100 warriors stationed around him at all times.

He owned the Water Vortex Spear.

He loves his people so much that he remained captive rather than harm them.

He is very wise and understood the danger of the Orc Lord and the effect of his abilities.

Forest Disturbance Arc
The Lizardman head was very disturbed to discover his fears of the appearance of the Orc Lord were true.

The Lizardman Head sent Gabil to recruit Goblins to serve in their army against the Orcs.

He could immediately recognize the power of Souei when he came to negotiate the terms of their alliance when the surrounding soldiers could not. Where he was instructed to defend themselves in their fortified castle, but not to attack and Rimuru would arrive in five days.

During the battle the Lizardman Head understood that every lizardman that died would result in the orcs gaining strength. So he ordered all injured lizardmen to be removed from the front lines. However on the fourth day the Lizardman Head was overthrown by his son Gabil. The Head sent out the Guard Captain to alert Rimuru about what happened. Then the head was detained and locked in an underground chamber.

Once the orcs began to press their way into the underground chamber he orders his soldiers to fight to the death to allow for the women and children to escape. At that moment Souei showed up and saved them.

He differed all judgement and reparations to Rimuru who's forces were the sole reason for victor that day.

Upon completion of the battle Gabil was imprisoned. The normal sentence for treason would have been the death sentence, but instead he exiles Gabil and forbids him from calling himself a Lizardman. However he simultaneously gifted gabil the Water Vortex Spear.

Founding the Demon Capital Arc
He went to swear his loyalty to Rimuru for his ascension into Demon Lord, and taking the Great Jura Forest as his domain. He was given the name Abil. He then swore upon this name, his loyalty to Rimuru.

Abilities
When he became the leader, his intelligence increased.

When Rimuru bestowed him a name quite a large amount of divine protection was given to him.