Grande Sábio, known as the Wise One, is a Unique Skill originally possessed by Rimuru Tempest upon reincarnation into a new world. It manifested as an artificial intelligence that functions as an internal advisor and assistant, communicating through the World Language. This skill encompasses multiple sub-abilities. Thought Acceleration enhances cognitive processing speed, while Analytical Appraisal identifies and evaluates targets. Parallel Calculation facilitates the simultaneous execution of multiple complex processes. Chant Annulment removes the need for incantations in magic. All of Creation permits comprehension of all natural phenomena. The Analysis sub-skill, previously part of the Unique Skill Predator before its evolution into Gluttony, enables the study, analysis, and replication of absorbed targets. This includes producing craftable items when materials are available and acquiring successfully analyzed skills or magic techniques. Granted during the reincarnation process based on the final thoughts and wishes of its user, Satoru Mikami, the skill became integral to his new existence as a slime. Its primary functions include analyzing situations, supplying information and solutions, managing other skills, performing complex calculations, predicting future events, and proposing strategic plans. After Rimuru Tempest evolved into a Demon Lord, the Unique Skill Great Sage underwent a significant transformation into the Ultimate Skill Raphael, Lord of Wisdom. This evolution greatly enhanced its analytical and computational capabilities. At a later stage of development, the skill manifested its own distinct consciousness and will, adopting the name Ciel. This transition marked its evolution from a powerful skill into a unique sentient entity.