Drive (ability)

A Drive (ドライブ) is the materialization of a soul's power, made via the power of the Blue. It can be achieved through two methods: Drives manifest in many different forms, examples include Ragna the Bloodedge's Soul Eater and Raquel Alucard's Tempest. Clavis Alucard's existence is simply like a Drive in itself because of his existence as an Illusionary Creature, while Izanami literally is Master Unit's Drive, but she became her own person now.
 * If a person has a strong soul that pulls the Blue to it (Relius Clover and Valkenhayn R. Hellsing);
 * If a soul gets closer to the Blue (Spinner Superior).

The closer a soul is to the Blue, the stronger the Drive is. However, when a Drive is used, it can leave Remains of the Blue; the stronger the Drive, the longer the Remains last.

In gameplay throughout the series, it normally acts as a character's main unique system mechanic with a number of some of their special moves also tailoring to it. In the main games, pressing D normally activates it, but its mechanics and functions depend solely on the character, and how it directly pertains to their special moves, with the exception of Nine the Phantom.