Lydia Doll-013

A Geist-hunter and Shion's partner. She is another interdimensional combat Doll sent to the human world with the mission of stopping the Geist outbreak by killing them. Being a "mass-produced", double-digit Doll, Lydia's combat abilities are far weaker than Shion's. During their mission, she and Shion split up to investigate Kitano Seikatsu Academy. However, she falls into a trap and gets caught by the Geist at the start of the story. "Geist" are non-corporeal beings from another dimension that travel to the human world to possess them in order gain a physical body to carry out their desires to cause deconstruction and/or sex. The human host receives special mental and physical powers, but also gains the same strong desires and memories of the Geist.

"Dolls" are essentially organic androids from another dimension that were created for the purpose of hunting down and killing their long time enemy, the "Geist". Artificial Human: Basically what all Dolls are.

Dimensional Traveler: All Dolls are from another dimension and came to the human world to hunt down Geists.

Emotionless Girl: Dolls apparently were created to have no emotions; however they do seem develop them over time.

Form-Fitting Wardrobe: The Dolls' catsuits leave very little to the imagination.

Inhumanly Beautiful Race: Invoked. According to Shion, Dolls are created to look beautiful and appealing to Geist as a means to attract them.

Magical Girl: A more more sci-fi variation, but they still count.

Robot Girl: Subverted. Dolls certainly function like this, as they can be programmed, mass-produced, and its even hinted that they can be "repaired", but they are in fact organic outside of their equipment. The biggest indication of their organic nature is the fact that they can be impregnated by humans and Geists.

Sleeves Are for Wimps: While in their uniform, Dolls do not wear sleeves.

Super Prototype: Single-digit Dolls like Shion Doll-007 and Infinity Doll-008 have more powers and individuality compared to the "mass-produced", double-digit Dolls like Lydia Doll-013 and Infinity's Bodyguard Babes. Single-digit Dolls are the only one of their "model".

Adaptation Expansion: Lydia doll 13, only appears for one scene in the H-game, but is given a lot more screen time in the anime.

Baby Factory: Gets the unfortunate pleasure of being repeatedly impregnated and forced to give birth to many Tentacle Geists over the course of several days.

Balloon Belly: Spends a good chunk of the story with a bloated stomach due to the sheer number of Naughty Tentacles forced down in her orifices, on top of being forced to be a Baby Factory for the Tentacle Geists.

Damsel in Distress: Spends most of the story being captured and sexually tortured by the Geists.

Decoy Protagonist: Of the anime. She is the main focus for most of the first episode.

Face Full of Alien Wing-Wong: After being captured by the Geist, they decide to torture Lydia by having her repeatedly impregnated by the non-human Tentacle Geists and forced to continuously give birth to the monsters.

Faux Action Girl: She ends up captured relatively easily by the Geists at the beginning of the story.

Green Eyes

Hot Mom: Technically, after being forced to be a Tentacle Geist Baby Factory.

Katanas Are Just Better: Her weapon of choice.

Leotard of Power: Unlike the other Dolls that wear full catsuits.

Lovely Angels: With Shion Doll-007, before Lydia was captured.

Ms. Fanservice

Parental Incest: Many of the Tentacle Geists that raped and impregnated her when she was forced to be a Baby Factory included her own "children".

Screaming Birth: When she was forced to give birth to a Tentacle Geist, although her screams were muffled due to the Naughty Tentacles shoved down her throat.

Thirteen Is Unlucky: She is Doll-013, and nothing has gone right for her since she was sent to the human world.

Ugly Guys Hot Daughter: Inverted. She is the Hot Mom to the rather ugly Tentacle Geists that she was forced to give birth to.

Zettai Ryouiki: Grade A.