For some reason I see them as “soul-mates or pure love” in a similar to komugi and meruem from HXH… purposely left vague and depending on the viewer it could be interpreted as platonic or romantic. They certainly have a deep bond. Heavily disagree with father/daughter, just infantilizes Furina who’s a grown adult and is a disrespect towards her character when she’s an incredibly strong person. Neuvillette and Furina are equals (also both neuvi and meruem are powerful non-humans who end up gaining humanity)
Being totally honest as a person who doesn't like Puzzles I love the character But the end of the movie is so... Really bad if they had had the desire they could make one of the best endings of all the arcs if they decided to kill Luigi it would really be something very sentimental and they would really have a motivation to hate Puzzles so much other villains made worse things happen and not spaghetti western, it has to be perfect and the WOTFI 2023 I feel like it's not much against the genesis arc or the movie of revelations
i suggest you check out his VA’s in stars and time playthrough, where he plays a character with mr. puzzle’s voice and calls you ‘stardust’ for five minutes straight