Murasame Shizu

Oshizu Murasame, the ghost of a girl who died in the old abandoned school building 400 years ago, the cause of her death is unknown, it's hinted that she was used as a sacrifice to try to make it rain because of the era she lived in was described as a "living hell" due to a lot of people desperately starving from a famine do to a drought. Since her meeting with Rito and the others, she begins exploring the world outside the old school building. Oshizu is aware of Haruna's crush on Rito by her ability to sense feelings while possessing another person and becomes very supportive towards cheering Haruna into confessing her feelings to him.

Oshizu "returns" to the living after Ryoko Mikado creates a prosthetic body for her to inhabit, built with biological qualities (looking and feeling like an actual, human body). However, she occasionally "disconnects" from her body during brief moments of excitement or being frightened dogs. She currently works as an assistant for Mikado her medic. In the first anime, Oshizu is not given a new body and her presence is limited, while in the OVA and Motto To Love-Ru and so on, she has her own body as she does in the manga.

Her real name is Shizu Murasame. She likes to be called Oshizu better.

Appearance
Oshizu has  long  blue  hair   and   eyes. In her ghost form, she wears a white kimono and purple sash, she also has light colored flames flouting around her, can be slightly see through and instead of legs she has a ghostly tail. She looks the same in her human body only with any ghost features, o n some occasions, when working at Mikado's clinic, she is seen wearing a pink nurses uniform.

Personality
Oshizu is sincere, kind, and very curious about the modern world and has a severe case of cynophobia (fear of dogs), likened to Haruna Sairenji's level of fear to the supernatural (who also has a pet dog), the cause of this is unknown. When frightened of other things, she can emit blasts of mental stress, blowing apart various objects and surroundings with her poltergeist power, she also tends leave her body by accident when scared or excited. Oshizu can also be a bit of a blockhead because she easily misinterprets certain situations and can go off topic. Oshizu is quite determined about helping Haruna confess her love for Rito by using her powers. But that usually ends up in a perverted accident

Powers and Abilities
As a ghost, Oshizu is capable of possessing others. While she possesses others, she can also look through their memories and understand their feelings, especially feelings towards others. Also as a ghost, she is capable of flight, intangibility, telekinesis, and poltergeist, while in her human body most of her ghost powers are limited but she is still able to use her telekinesis and poltergeist. By pointing with her middle and index fingers, she can create huge forces that can blast through walls, and can also use this to control the bodies of other people's will without possessing them.

Although she technically has good intentional control over her powers, her vulnerability to distractions as well as her panics around dogs make her easily lose control, with disastrous results. Interestingly, when her powers go berserk, they inexplicably cause all kinds of perverted mishaps around Rito, such as stripping the clothes of girls in front of him, or throwing him over those girls into a provocative position, even Yui claims that it's prohibited on school grounds.

Oshizu is also capable of exorcism and extrasensory perception. In To Love-Ru chapter 144, she was able to sense the aura that haunted Zastin's apartment, and subsequently pulled out the spirit that possessed Zastin. She can also use her telekinesis to control the flames floating around her (when in ghost form) to target her opponents and set them on fire similar to pyrokinesis, it's unknown if this effects other living things or just other spirits.

Due to being Mikado's assistant for a while now, Oshizu picked up some medical skills to be able to heal others but she quite clumsy and she would hurt others instead when frightened.

Ryoko Mikado
Mikado was the one who created Oshizu's artificial body for her to walk among others. Oshizu now lives with her and works at her clinic as her assistant (she can be clumsy though). Oshizu is very obedient to her, such when Mikado asked Rito to rub suntan lotion on her, she had Oshizu use her powers to force him to do it.

Haruna Sairenji
Originally Haruna had great fear of ghosts and anything supernatural, but while becoming closer to Oshizu, her fear seems to have lightened (although she still shows a slight fear of it). Oshizu knows about Haruna's feelings toward Rito after possessing her and often supports and encourages her (sometimes using her powers) to confess to Rito how she feels and tries not to let Lala get in the way, but most of the time when she does use her powers to help them come together it ends badly.

Rito Yuuki
Rito is one of the closest friends she has. She tries to get him and Haruna together, even if it means using her powers. In To Love-Ru Darkness she has shown to have some interest in Rito, noting the kindness he possesses that earned Haruna's and Lala's affections, but it's unknown if she also has feelings for him, in the original series she did try to kiss him (Chapter 65) but only to get herself out of Haruna's body. Her attempts to use her psychic powers, her often clumsy use of them, as well as her panics around dogs, often cause trouble for Rito, including causing Rito's latest love confession for Haruna to fail at the end of To Love-Ru.

Mea Kurosaki
While trying to find out more about Mea and her master Nemesis, Oshizu took possession of her to see if she can find anything important inside her mind. While inside, she saw Mea's desire to have Rito lick her. More importantly, she saw a memory of Mea fighting a group of dangerous aliens demanding to know where Yami is, and also a moment when Mea is talking to Nemesis, but Oshizu was unable to see her.

Oshizu discovered that deep within Mea's mind is a darkness so deep that it might have consumed her entirely had she not escaped in time. Frightened by what she saw, Oshizu has been highly mistrustful of Mea ever since. Although she did see a nicer side to her when she helped Yami become closer to Tearju (Darkness Chapter 30), which was different from what she saw within her before.

She also take consideration to approach Mea and become friends by following her but ends up being teased by Mea. Oshizu was irritated by Mea and said that she hates her. Mea said to her that she did not hate her as she can talk to her as her 'real' self.

Oshizu asked her why she hides her identity even when she was comfortable with it. Mea tells Oshizu that acting as an earthling is no use no more but at the same time, she does not want to discard her identity as Kurosaki Mea.

Trivia

 * She appeared in Mayoi Neko Overrun! as a customer (with Haruna).


 * Being over 400 years old she is easily the most oldest character of the series