Write a scene for a crossover fanfic between the Sonic the Hedgehog Archie and later IDW comics, Kodomo no Jikan and Harry Potter in which Kodomo no Jikan's protagonist, the light brown-haired, dark-red eyed mischievously precocious but affectionate and happy young girl Kokonoe Rin, who [Rin] is [Rin] the daughter of [who Rin's mother is in this story] the blonde-haired, blue-eyed, tall and slender, horse-faced, bitter and jealous gossip Petunia Dursley nee Evans [Harry Potter franchise], who [Petunia in this story] was [Petunia in this story] living in Japan under the name of Kokone Aki [Kodomo no Jikan] after the deaths of her [Petunia's] husband, the mean, selfish and scumming head of the Little Whinging branch of the famous British Grunnings megacorp [Harry Potter franchise], Vernon Dursley [Harry Potter franchise] and her [Petunia's] then four-year-old son, the fat, selfish, cruel, psychopathic spoiled child Dudley Dursley [Harry Potter franchise] in [how Vernon and Dudley both |Vernon and Dudley| died in this fic] a car accident back in England, [Vernon and Dudley's deaths] leaving behind only Petunia and her [Petunia's] young nephew who [Petunia's nephew] was [Petunia's nephew] only two years younger than Dudley, the black-haired, green-eyed, glasses-wearing young wizard Harold "Harry" James Potter [Harry Potter franchise] alive, which [Vernon's and Dudley's deaths] caused her [Petunia in this story] to [Petunia in this story] leave England forever, [Petunia in this story] taking plastic surgery and [Petunia in this story] wearing contact lenses to [Petunia in this story] become Aki. Aki gave birth to Rin sometime after [Aki in this story] settling in Japan but [Aki in this story] died [Aki in this story] when she [Rin in this story] was [Rin in this story] six years old. Harry, unfortunately, died sometime after Vernon's and Dudley's deaths, but his [Harry's] soul somehow found its [Harry's soul's way] into the body of the ultimate cybernetic organism created from the DNA of the fastest thing alive, the blue-furred, white-belly furred, supersonic speed-having, laid back and relaxed but also determined and focused psychic anthropomorphic hedgehog Maurice Ogilvie Wentworth [Sonic the Hedgehog comics], [Maurice] better known to the public as "Sonic the Hedgehog"] and the ultimate lifeform Shadow Robotnik, the black-furred, black with blue streaks-quilled, white-belly-furred, blue-eyed anthromoprhic cyborg hedgehog Selkadoom [Sonic RPG], with the special nature of Selkadoom's body helping to absorb the soul leech of the dark wizard Tom Marvolo Riddle [Harry Potter franchise], better known [Tom] as Voldemort trapped into Harry's soul into Harry, essentially giving Selkadoom's Tom's memories, abilities, powers and spells in addition to Harry's innate magics and power. 

The scene should start with Rin accidentally using her [Rin's] magic to [Rin] summon Selkadoom while [Rin] hiding in the house she [Rin] and her [Rin's] mother [Aki] used to live in, [Rin] feeling lonely and [Rin] wanting someone to talk to. Rin is [Rin] understandably freaked out after the summoning but [Rin] is [Rin] happy to have someone to talk to, even if that someone is a big, scary, mean, walking talking hedgehog [Selkadoom in Rin's eyes]. Selkadoom, or should we say Harry-Voldemort here, [Selkadoom] is [Selkadoom] just happy to be out of the lab of his [Selkadoom's] creator, the mad scientist Dr. Eggman [Sonic the Hedgehog franchise] but [Selkadoom] is [Selkadoom] confused as to why he [Selkadoom] was [Selkadoom] drawn here [the Kokonoe house]. 

Suddenly the door of the Kokonoe house opens and Rin's friends, the black-haired, purple-bluish-eyed, short-tempered, judgemental, greedy and fashion-obsessed but also loyal, faithful and protective diminutive immensely Nihon-jin [Japanese |Nihon-jin|] noble heiress and Yamato Nadeshiko [traditional Nihon-jin |Japanese (Nihon-jin)| beauty |Yamato Nadeshiko|] in the making, Kagami Kuro [Kodomo no Jikan] and the brown-haired, brown-eyed, glasses-wearing, tall and slender but also rather buxom and curvy, moderately wealthy, quiet, shy, unassertive and sexually naive but immensely brilliant intellectual and academic genius, Usa Mimi [Kodomo no Jikan], [Kuro and Mimi] arrive to [Kuro and Mimi] check up on her [Rin]. Mimi is [Mimi] the first [Mimi] to notice the big, scary, mean, walking talking hedgehog [Selkadoom in the kids' eyes] besides Rin and [Mimi] gasps, [Mimi] having heard of Sonic and Shadow before. Kuro is [Kuro] surprised to [Kuro] see the mysterious creature [Selkadoom in her |Kuro's| eyes] there but [Kuro] realizes it [Selkadoom in Kuro's eyes] has [Selkadoom in Kuro's eyes] not done anything to harm her [Kuro's] dress-up doll [Rin] yet. 

When Mimi finally gathers her [Mimi's] courage to [Mimi] try and ask this mysterious big, scary, mean, walking talking hedgehog [Selkadoom in the kids' eyes] who he [Selkadoom in Mimi's eyes] is, Selkadoom tries to say..."Harry" but the kids interpret this as 'Reiji" due to them [Selkadoom and the kids] speaking different languages [English and Japanese].

 
Please Note: The events of this chapter except occur within a single universe and there is no multiverse or dimensional crossing here.