alfa_(ponkotsu-robo)
Original character by Yuuhi Alpha.
She is usually described as a half-robot girl who has green short hair and a red inverted triangle component on her forehead. She often has short twintails. Her owner is Skywind Ehrhardt.
Depending on the situation, she may have various other settings, nicknames and characteristics; as an example, her Pixiv Robot Wars version is different from her fantasy-world counterpart.
Some of her alternative names are: アルファ・エアジール (Alfa Eazieru, that was apparently named after Alpha Azieru), アルツー (Al-two), TYPE:ALFA or ポンコツロボ (Ponkotsu-Robo, A Bungling Junk Robot ~ it was used as her pixiv tag).