Born Dean Dillian to a witch and a warlock, Prof. Dillian grew up in London. He was born in March 17, 1980. He is currently 27 years old. As his mother was a witch and his father a warlock, he grew up in a Magical Community beyond the boundaries of the unseeing Muggle Community. His mother was the sole care and love giver, while his father worked in the Council of Magical Creatures in the Ministry of Magic. His mother, Annarascia, taught him everything he learned before he attended school for wizards. He attended Durmstrang Academy, traveling away from his parents.
In Durmstrang Dean learned as much as he could about the magical world, but besides potions, charms, and spells, it was magical creatures that impressed him the most. He finished school strong, being granted his permission to apparate and operate as a wizard. He was competent, as he passed his tests with Outstanding scores. Therefore, when he finished school and decided to travel around the globe alone with just a backpack and a wand, his parents did not object.
Prof. Dillian encountered numerous magical creatures around the globe! Although most of them are under charms of concealment or under a spell from the Ministry og Magic, he was able to lift them all for himself with the high magic powers he possessed. He knew he would encounter amazing creatures, so he decided to carry several notebooks and ink to write with. He drew every creature he encountered and wrote all about it, as he followed each creature for a couple of months to learn as most from them as he could. Eventually, after several years, he returned home.
On his return home, he talked much to his parents about what he learned. They told him that he was good at relating what he encountered, and they pushed him towards becoming a professor. He did not object! He sure wanted to do it. He had learned so much that now he wanted to teach others. He learned from childhood friends that there were job openings in Hogwarts School of Witchcraft and Wizardry, so he applied and got the job. He is now the Professor of Beginners Care of Magical Creatures.
Thus, to this day, nobody really knows what he encountered. Sometimes, at night, he is still haunted during his sleep by the horrors he saw deep in the jungles, and submerged in the vastness of the oceans. Nobody truly knows what happens. He disappears once a month though, not knowing where he is going, not knowing why.