I really shouldn’t have to state that I despise Katrielle Layton, as well as any new character from that God forbidden game. If they’re not egregiously annoying then they’re bland, 1-note characters with no personality whatsoever. There isn’t a single exception to this rule.
But the worst is absolutely Katrielle herself. You go from Hershel Layton, the single most charming, likable, perceptive, gentlemanly, yet somehow relatable character I and many others have ever seen, and replace him with a character who is completely oblivious to the world around her except for when the plot absolutely demands it, is driven only by fame and money, makes deductions about each case with no proof and somehow gets it right every time (only to make fun of someone who actually puts the effort into gathering overwhelming evidence for each case), and on top of that give her the damn “is constantly hungry” anime trope and make it one of her defining characteristics. Then you insist on saying she was somehow raised by the previous protagonist and throw her in a game with absolutely none of the charm, personality, or cleverness of the rest of the series.
End of weekly Katrielle and the Millionaire’s Conspiracy rant
Also, I don’t know if this is a popular opinion or not, but I really don’t like the character of Candice Flynn from Phineas and Ferb. Nearly every episode that revolves around her can either be described as “hair brained scheme to get her brothers in trouble that invariably fails yet she’s still somehow surprised,” “An attempt to not embarrass herself in front of Jeremy,” or both. Both of these plot points got really old after the first few episodes and I often find myself wishing they’d just get back to the B plot with Doofenshmirtz, who basically has the same schtick but actually funny and clever. Yeah, she has some really good moments, but 95% of her screen time is just annoying and it single handedly brings the entire show down from a solid 9 to a 7 or 8.