Marian

Marian was originally an Elysion Nikke belonging to the Silver Gun Squad and was first Nikke under your command during your first mission to the Surface. Unfortunately, Marian was corrupted and you were forced to put her down. Later, she was revived and turned into a Heretic under the name Modernia and became your enemy. During a special operation and with the Ark support, you were able to save Marian and bring her back to your side but at the cost of her losing her memories. Despite losing all memories of her past, she still remembered you and was more clingy towards you.