Greta Hideg is the main villainess of the 2019 Greta. She is an obsessive piano teacher and former nurse.
Greta Hideg is the abusive, psychopath who had recently killed many people, except both Frances and Erica. She can stop at nothing until she finishes her duty of abusing and kidnapping people.
Crossover War Heroes Series
Greta Hideg debutted as one of Prozen's minions in order to to support her leader and master. Suddenly, she and Jail arrived to aid Mikie Okamine after she was defeated by the hands of Milinda Brantini and the heroes. Following the deaths of Yan Baihu and the Bruters, she and the villains reappared during ceremony. However, she and Prozen's followers were ambushed by Ranko Kanzaki just before having the escape. While helping Prozen, she will stop at nothing until her support was done. Unfornately, she and Jail met their demise against the hands of Lucifer Langdon.
Allies and enemies
Allies: Gunther Prozen, Thaddeus Valentine, Hajime Busuzima, Thornheart (deceased; killed by Milinda Brantini), Dr. Ellie Staple, Kain (RESTOL Special Rescue Squad) (deceased), Flinty McCallahan (deceased), Matori, Dr. Zager, Gozu (Pokemon), Mikie Okamine, Masakuni Mido, Jail Scaglietti, Gabby Jay, Alva, Kuroto Dan/Kamen Rider Genm (formerly), Rustal Elion, Carta Issue, Iok Kujan, Gallus Bauduin, Elek Falk, Iznario Fareed, Nemo Baklazan, Julieta Juris, Wolf Rocky, Knight Unryuji (formerly), Shia Kijima, Wilfrid Kijima, Saga Adou, Swartz (Kamen Rider), Uhr, Ora, Tid, Nom Nom, Valerie Da Vinci, Pierce (Pokemon)
Neutral: Lucifer Langdon
Enemies: Luigi Latorre, Hibiki Tachibana, Tsubasa Kazanari, Chris Yukine, Maria Cadenzavna Eve, Shirabe Tsukuyomi, Kirika Akatsuki, Miku Kohinata, Souji Tendou/Kamen Rider Kabuto, Arata Kagami/Kamen Rider Gatack, Ruuji Familon, Arashi (Zoids), Midori, Heero Yuy, Kira Yamato, Setsuna F. Seiei, Bugs Bunny, Marika Kato, Milinda Brantini, Sento Kiryu/Kamen Rider Build, Milinda Brantini, Dominic Toretto, Greg Heffley, Tsubomi Kido, Wade Owen Watts, Shouya Ishida, Hei (Darker than Black), Ryuga Banjou/Kamen Rider Cross-Z, Soichi Isurugi, Misora Isurugi, Sawa Takigawa, Eiji Hino/Kamen Rider OOO, Professor Kukui, Professor Burnet, Kouta Kazuraba/Kamen Rider Gaim, Kaito Kumon/Kamen Rider Baron, Mitsuzane Kureshima/Kamen Rider Ryugen, Takatora Kureshima/Kamen Rider Zangetsu/Zangetsu Shin, Suzuka Kamiki, Gas-House Gorillas, Kazumi Sawatari/Kamen Rider Grease, He Jin, Hyde Kido, Bastion Misawa, Horrid Henry, Mirei Mikagura, Etemon, Volcamon, Yūna Yūki, Mimori Tōgō, Fu Inubouzaki, Itsuki Inubouzaki, Karin Miyoshi, Sonoko Nogi, Hiroki Nagase, Masaru Ooyama/Akaba, Syuuya Aikawa/Aoba, Syoukichi Mihara/Kiba, Futaba Ichinose, Chitose Karasuma, Kenzo Tenma, Kudelia Aina Bernstein, Atra Mixta, Wataru Kurenai/Kamen Rider Kiva, Kivat-bat the 3rd, Kate Green, Gentoku Himuro/Night Rogue/Kamen Rider Rogue, Rinna Sawagami, Nariaki Utsumi, Akari Tsukimura, Leena Toros, Aila Jyrkiainen, Mitsuya Majime, Hester Shaw, Kouhei Araki, Jiro, Ramon, Riki, Leo Conrad, Sally Land, Seraphimon, Cherubimon (Good), Ophanimon, Guardian Eatos, Kuroto Dan/Kamen Rider Genm, Knight Unryuji, Rona Tsunomori, Rei Kiriyama, Yuinshiel Asteria, Rena Asteria, Hazuki Kagimura, Touma Kamiyama/Kamen Rider Saber, Rintaro Shindo/Kamen Rider Blaze, Kento Fukamiya/Kamen Rider Espada, Ren Akamichi/Kamen Rider Kenzan, Ryo Ogami/Kamen Rider Buster, Tetsuo Daishinji/Kamen Rider Slash, Ranko Kanzaki, Grizzly Bear, Panda Bear, Ice Bear