May contain spoilers to some. If you don’t hate spoilers with a hot, burning passion, feel free to click more to read the rest of it.
Seems like most people knows Qiu Kui, our ninja friend is JieEr. Or thinks. Naturally, it would slaughter the mystery if Qiu Kui turns out to be a complete stranger; but to jeopardize plot consistency in favor of a few laughter or convenient coincidences, is, in my opinion a planning flaw.
Come on now, Qiu Kui, being one of the best street basketball players, got hit, twice (not once, but twice), in the face by DaYing’s ball during PiLi’s first formal basketball game while she is Intently watching the game – is totally, completely, undoubtedly sound. Not to mention the utter disregard of time and space where one takes to travel from one place to another. Like how JieEr transformed into her Qiu Kui attire and apparated to the basketball court from the hospital that’s said (according to W) to take about 4-5 hours of driving, the night before Pi Li’s game. (She might even have a Firebolt, just in case. Because a Nimbus 2001 is just not fast enough.) Oh one more, JieEr must not be too poor being the survant of DongFang Xiang, because she has two phones – one for him to call her as JieEr, the other for him to text her as Qiu Kui. Different phone numbers because he mustn’t know JieEr is Qiu Kui, Qiu Kui is JieEr right? And the fact that apartments around school were too expensive to afford that JieEr Had to consider moving into the haunted dorm (back in the first few episodes), was just her being cheap.