TV-Series
Description
Isaac Morton is a student at the same school as the protagonist, William Twining, and serves as his closest and most loyal friend. He is a young man of short stature with distinct features including crimson red hair cut to ear length and matching red eyes, often complemented by notably thick eyebrows. His typical attire consists of the standard school uniform.

Coming from a family of successful merchants, his father made a fortune trading spices and tea from India to England, which provides Isaac with a comfortable background distinct from William's aristocratic but financially strained circumstances. Despite his family's wealth, Isaac struggles significantly in his academic pursuits. He is portrayed as a poor student who has even been held back a year, remaining in the lower fifth form while his peers advance, which stands in stark contrast to William's consistently outstanding grades.

Isaac's defining characteristic is his deep and enthusiastic belief in the supernatural. He is an avid enthusiast of occult phenomena and firmly believes in the existence of angels, demons, fairies, and other magical folkloric creatures. So dedicated is he to this belief that he engages in charming rituals such as leaving out milk and cookies every night in the hopes that a fairy will grant his wishes. His personality is generally easygoing and peaceful, allowing him to coexist comfortably with William despite their diametrically opposed worldviews. While William is a strict realist who rejects anything not proven by science, Isaac admires his friend, often offering him praise and showing remarkable patience with William's dismissive attitude. He is also intensely trustworthy, proven by his willingness to keep William's involvement with demons a secret even as his curiosity about the paranormal grows.

Within the story, Isaac occupies the vital role of William's anchor to the human world and his sole confidant at school. His unwavering friendship provides William with a sense of normalcy amidst the extraordinary events involving demons and angels. Despite his lackluster academic record, Isaac possesses a surprising aptitude for practical magic and the dark arts. He is highly skilled in summoning and knowledgeable about the demonic realm, demonstrating a competence that exceeds even William's abilities in this specific area. In one notable instance, he managed to defeat William in a practice battle conducted at the behest of a magic instructor, proving that his expertise in the occult is genuine and formidable.

Isaac's key relationships are centered primarily on William, whom he considers his best friend. Isaac is consistently supportive, even offering William a part-time job on his family's estate to help alleviate his financial problems. He also develops connections with the supernatural beings that enter William's life. He is fascinated by the demons, including Dantalian and Camio, referring to the latter with respect as the head boy. He also gets along with the angel Kevin, showing interest upon learning his true nature, though Kevin remains prepared to erase Isaac's memories if the knowledge becomes too dangerous. His open-minded and friendly nature allows him to bridge the gap between the human and supernatural worlds more easily than the skeptical William.

In terms of development, Isaac remains a steadfast figure of support and comic relief, yet his character subtly reinforces the series' themes regarding faith and knowledge. Though he is academically inferior to William in conventional subjects, his open belief in the unseen and his practical skill in magic demonstrate that intelligence takes many forms. His unwavering loyalty and trustworthiness prove that he is far more than a simple-minded occult enthusiast; he is a dependable friend whose strengths lie in his heart and his specialized knowledge rather than in book learning. He also hosts a bonus series segment where he reads biographies of various demons, typically ending with him being playfully insulted, highlighting his role as an accessible guide to the lore of the series.