Despite his young age and relative obscurity as a researcher, Cyno holds the position of General Mahamatra in the Akademiya and takes his position seriously. Cyno is extremely dedicated to upholding the Akademiya's rules and punishing any transgressions, to such an extent that even the sages of the Akademiya (ostensibly his superiors) are wary of him. Notoriously, Cyno will relentlessly pursue any individuals that try to flee his judgment, even across the desert - a trait that, in combination with his prowess as a hunter and warrior, makes escaping from Cyno nigh impossible. Due to this, Cyno's name is infamous within Sumeru and many scholars fear the prospect of ever meeting him, despite the fact that he only handles cases of significant interest.
Notably, Cyno idolizes "justice" above all; though this predominantly manifests in his pursuit of suspected criminals, Cyno will also protect criminals from any danger that arises during their escape attempts until they can, in his view, be properly judged by the Akademiya. Although he is often viewed by the Akademiya's scholars as an obstacle or a threat to their research (complaints to which Cyno is indifferent), Cyno views his role as that of a protector, preventing seekers of knowledge from being led astray and becoming dangers to both themselves and the world.
Despite his seriousness in academics and work-related matters, Cyno is fairly relaxed outside of Akademiya duties, being an avid fan of Genius Invokation TCG. He also shows concern for Collei, frequently visiting her when he has the time to ensure that she's doing well. Aware that his reputation as General Mahamatra often intimidates those around him (even his fellow Matras), Cyno tells jokes as a way to help people relax around him, though his jokes are generally unfunny and his long-winded attempts to explain them even more so.
(from
Genshin Impact wiki)