Alu-fiend

Alu-fiends are the product of successful procreation between a succubus and a male mortal (mostly humans). Females are, generally, attractive or beautiful, going to great lengths at times to conceal their needle-like teeth and diminutive wings. They often possess a high degree of sexual proclivity. Males, however, require more discriminative attention, as its "cousin", the cambion (produced from a female mortal), possesses many of the same "abyssal" traits which form both creatures' overall appearance. This has led to a diminishing use of the patrillineal and matrillineal-influenced terms as a whole; rather, products of both partnerings are considered "half-fiend".

Rules in Successive Editions
Alu-fiends, also referred to as alu-demons, first appeared in the Monster Manual II. They were described in the Monstrous Compendium Outer Planes Appendix and the Planescape Monstrous Compendium Appendix. While their exact statistics varied slightly, the general concept as the offspring of a succubus and a mortal male remained true.

In the Third Edition rules, half-fiends were presented as a more general template, in lieu of specific entries for each instance. There has been no specific publishing of an alu-fiend template by official sources. However, a half-succubus template was included in a Dragon Magazine web article, written by Robert Wiese, on half-fiendish variety, and appears on the Wizards of the Coast website.

Alu-Fiends in the Forgotten Realms
Aliisza, an alu-fiend, appears prominently in the War of the Spider Queen (novel series), and is the main protagonist in The Gossamer Plain, the first book in the Empyrean Odyssey trilogy.

Anderia and Estellia are the alu-fiend allies of the nabassu Viscaris

Though apparently not the daughter of a succubus, Graz'zt's daughter Thraxxia appears in the form of an alu-fiend.

Kin
The male equivalent to an alu-fiend is generally called a cambion. Successive offspring from either (with mortals) are demonic tieflings.