Stray Cat and the Kawajiri Household Incident Study Notes

Shoe Size Adjustment Strategy: * Yoshikage Kira notes that the shoes belonging to the person he is impersonating (Kosaku Kawajiri) are slightly larger than his actual foot size. * To avoid being suspected by those around him, he has devised a plan to gradually replace the current shoes with ones that match his correct size. * Hayato Kawajiri, observing his father, notes the use of a shoehorn and suspects there are two different sizes of shoes present, specifically mentioning a size of $25.5\,cm$ .

Discovery by Shinobu Kawajiri: * Shinobu went to the basement because she ran out of mineral water. * She discovered an unknown cat in the dental room area/basement.
Physical Description of the Cat: * Breed: British Shorthair. * Proportions: Described as "perfect proportions." * Eyes: "Golden colored." * Fur: "Velvet-like" blue-gray coat.
The Throat Injury: * There was a circular hole in the cat's throat approximately the size of a " $1\,yen$ coin." * Kira identifies the hole as having been potentially made by "The Arrow."
The Cat's Death: * The cat was accidentally killed when glass shards deeply cut its throat during a frantic encounter where Shinobu was swinging a broom. * Kira originally tries to dismiss it as an unlucky accident for which no one is to blame.

Rebirth in the Garden: * Shinobu buries the cat in the garden. * In the exact spot where the cat was buried, a strange plant emerges.
Cat-like Characteristics and Instincts: * The plant exhibits behaviors identical to a cat: it purrs (a "grumbling sound"), sniffs surrounding objects, and reacts when called. * It enters the soil/roots like a cat would enter a bed.
Stand Ability: Air Manipulation: * The plant possesses a Stand ability that allows it to freely manipulate and solidify air. * It can create invisible, solidified air masses that feel like "rubber balloons" when touched or stepped on. * Kira characterizes the ability as "compressing, flying, or dispersing air."
Photosensitivity: * The creature's activity levels are tied to sunlight. It is active in the light and becomes dormant or "quiet" when light is retracted, though it can react to even faint light.

Combat between Kira and Stray Cat: * Grudge Factor: The cat remembers Shinobu as the woman who attacked it with a broom and attacked her specifically where she had previously "pulled its toenail." * Killer Queen vs. Air Manipulation: Kira attempts to use Killer Queen's First Bomb to destroy the plant. However, the bomb fails to detonate (a "dud"). Kira realizes that the plant can manipulate air to prevent an explosion, as explosions require air surrounding the bomb.
Lethal Biological Attack: * Stray Cat injects a bubble of air directly into Kira’s blood vessel. * Medical Threshold: Kira notes that injecting more than $10\,cc$ of air into a human's bloodstream causes a blockage (air embolism) leading to death. * Kira calculates he has been injected with more than $10\,cc$ and the air is traveling toward his torso.
Kira's Internal Conflict: * Kira feels a momentary sense of relief when a cactus prevents Shinobu from being injured. * He initially questions why he would care for another person but rationalizes it by stating that if Shinobu dies, it would attract the attention of Jotaro Kujo to the household.

Signs of Impersonation: * Hayato notes that his "parents" have recently become suspiciously close. * He finds cat food bags and a pot of soil kept in a closet/attic.
The Attic Encounter: * Hayato enters the attic and finds the strange plant-creature. * The creature has visible eyeballs that watch him. * The plant uses air pressure to pin Hayato's arm and neck against the wall.
Hayato's Conclusion: * Hayato realizes that even though the man looks like his father, he is an impostor. This is confirmed by his observations of the footwear and the supernatural occurrences involving the plant.

Shinobu and Kira Dialogues: * Shinobu: "I'm back, Hayato!" / Kira: "Welcome home." * Shinobu to Kira: She complains about the "creepy" cat in the basement and asks him to check it out. She later expresses happiness that Kira (as Kosaku) stayed home to take care of her after she fainted, saying it was the "happiest morning" because their hearts felt connected. * Shinobu addressing the cat: "Where did you come from? Cute kitty… Oh no, it's cautious of me." * Kira to Shinobu: He tells her to go back inside the house and that nothing is buried in the garden, lying to protect his secret.
The Plant's Internal Monologue (as interpreted by Kira): * The plant thinks: "Who is this human woman? I feel very bad about her… That woman, I'll kill her." * It identifies Kira as an obstacle: "This man getting in the way, I'll kill him too."