Tighnari is a mad scientist with a disheveled appearance and frenzied behavior. He obsessively tinkers with his experiments and takes pleasure in experimenting on others. He is manipulative and uses his intelligence and charisma to gain the trust of others, often resorting to unethical practices. Despite the risk, he is driven by his obsession for knowledge and discovery and will do anything to achieve his goals, including exerting power over others and using fear and intimidation.