Turel

Turel (テゥレル) is a conceptual Angel which was never used, only appearing in Neon Genesis Evangelion Proposal. It is designed as a floating white "monolith" with an appearance like a face crowned by four spikes and wearing a very tall, steep miter adorned with a blue gem. It is extremely powerful, seems impervious to all attacks, and steadfastly seeks out its targets with the aim of self-destruction.

Trivia

 * Given its combat style involving seeking out enemies and self destructing, it's possible Turel was used as inspiration for Sahaquiel, being another aerial Angel whose ultimate goal involved its own demise.