Isfurus

Isfurus is a mage scientist that is investigating a mysterious fountain in Dernel Jungle that has healing properties. He is discovered during the Grand Youth quest, when a bottle of Healing Water is required to heal Monte's grandfather. Along with his partner, Erisk, he's developed a method of carrying the water in a specially prepared bottle, so that it doesn't lose its healing properties.

Location
Isfurus is found standing near the top of the fountain in Dernel Jungle.