User blog comment:DBard/Magicians/@comment-24098614-20131102210049/@comment-68.210.1.131-20131103082320

You forgot to mention that he has a soft spot for those who are fans of his show in the Underworld, LeFay being a close second when compared to Bennia. As for Issei's newfound "relationship" with LeFay, she makes the most sense to be his Magician on both personal and practical levels. On a personal level, LeFay is an upbeat, intelligent and polite young girl. These traits make it easy for Issei to be friendly with her combined with her developing looks, as the case would be. In addition to Issei's interactions with LeFay, he made a promise to her brother, Arthur Pendragon, to look after basically, according to the spoilers for Volume 16 of the Light Novels.

The practical standpoint for Issei's Magician pact can be considered twofold. First, next to obtaining familiars, forming a pact with a Magician is critical for a Devil if they wish to improve themselves and/or their position in the Underwold society. If a devil makes a pact with a powerful and/or well respected Magician then it will have a positive impact on the social standing of the Magicial and the Devil. Naturally, the opposite can be said about this as well. Second, between Issei's wants and needs - in terms of his priorties and desires - he AND Ravel would be hard pressed to find someone better then a descendent of Morgan LeFay, the one Magician who, accoring to legend, could challenge Merlin. Between the lienage, talent, looks and personality, Issei has found his match.