Elsa

One of Doctor West's creations, Elsa is a gynoid, built to be stronger and faster than an ordinary human, equipped with a pair of tonfas.
She ends most of her sentences with the suffix "robo".

Spoiler

Although she recognizes Kurou as her enemy, following an encounter where he saves her, Elsa admits her love to Kurou, much to his confusion.

Elsa's name is probably derived from Elsa Sullivan Lanchester, the star of the movie Bride of Frankenstein.

Spoiler

She became an Elder God along with Doctor West in the Secret Ending of Kishin Hishou, after defeated Another Blood and went through 996 different scenarios, much to Nya's surprisement and a dumbfounded Nero.