There are 214 Demons to track down in Shin Megami Tensei V. You can obtain Demons via Negotiation in battle or by fusing them using specific recipes. This page details the Night demon Succubus, and contains information on all of its skills, stats, fusion combos and more.
Originating in European folklore, the Succubus is the female counterpart to the Incubus. They visit men in their dreams sucking the life force out of them. They appear as great beauties in dreams, but in fact are ugly hags.