Neena's main appearance is rather plain with pink shoulder-length curly hair and purple eyes. She wears a white lab coat with a black bra and black panties underneath it. Near the end of the series, she receives a pair of red panties from Rudolf, infused with ultranate, which she walks around in for the rest of the series and leaves her breasts exposed.
Neena is spoiled by Rudolf Hagen (Neena's brother) to the point where she is devoted to him to an incestuous degree. She is very sadistic as she enjoys physically disciplining her subordinates and she also has a jealous side as she immediately dislikes the beautiful Aika Sumeragi for seducing her big brother, and dislikes the attention Rudolf gives Aika.
Neena later receives from Rudolf Hagen an Alternate (Ultranate) Metal panty which allows her to transform to a powered-up form Shivie Neena (the opposite of Aika Sumeragi's bra). She had similar power to Aika but it went out of control and she went mad with power. However, the device fusing into her soon runs out of control and she becomes a hideous monster. In this form, she embraces and kills her brother and flees into space cradling his corpse. Her ultimate fate is unknown. Her appearance is also in reverse with Pale skin, symmetrical look and red appendages.