Tighnari is the stern Chief Officer of the Forest Rangers and Collei's mentor. Despite his intelligence, he prefers to live a solitary life in the depths of Avidya Forest rather than in the ivory tower of Sumeru Akademiya. A young researcher well-versed in botany who currently serves as a Forest Watcher in Avidya Forest. He is a straight shooter with a warm heart — and a dab hand at guiding even the dullest of pupils.