Sandalphon

Sandalphon (Hebrew: סנדלפון) is the 8th Angel, discovered in an embryonic state, and annihilated, within the magma of Mount Asama.

Sandalphon's "adult" form is flattened, finned, and overall fish-like. The Cambrian Era (540-490 million years ago) aquatic predator Anomalocaris has been cited as conceptual inspiration, and a couple of features carry over directly: the ring-shaped, ventrally-positioned mouth and the large eyes situated atop stalks. Sandalphon has long, sinuous arms that terminate in human-like hands, each with four fingers and a thumb; the spines on the digits mimic those of Anomalocaris' feeding appendages. When it moves the arms are extended outward perpendicular to its body, like wings or fins. What appear to be a pair of mock eyes lie on the left side of the head, evoking the unusual optical arrangement of a flatfish. The Angel's core potentially lies beneath the left-hand "eye" (in battle, it is the target of two separate attacks by Asuka).
Sandalphon's physical constitution is specialized for the intense conditions within the volcano, to the point that even internal structures are uncompromised (indicated when it opens its mouth without adverse effect). As a result, a weapon such as the Progressive Knife is, normally, incapable of afflicting damage. Sandalphon is somewhat larger than an Evangelion, but still of close enough size to an Eva that they can engage in a fairly even melee combat.