These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Epileptic Trees: The Arsène Lupin in Night Hood lives in the mid-20th century and is somewhat colder than the early 20th century Lupin from the books. Because of that fans have speculated that Night Hood's Lupin is actually the original Lupin's son, Lupin II and father of Lupin III.
Older Than They Think: Detective Conan fans might be surprised to know that Kaito Kid owes a lot to Lupin. From using the sleight of hand to steal jewellery to his dress code (with the only difference being that Lupin wore black while Kid wears white, and Lupin's cape didn't turn into a glider).