I actually don't mind her. I'm not into the anime that much but I'm trying to catch up There's uglier and more annoying tamagotchi characters. But I guess this is pretty much based on opinion. When I first saw Lovelitchi and Melodytchi I was like ugh and by that point, a lot of more girly characters were made. I wasn't really surprised seeing Coffretchi. She's actually pretty cute.
Hey! At least we know that Bandai Japan isn't going to give up tamagotchis anytime soon 'cause they're still creating a lot of new characters. It's like you're saying that she has an ugly voice and she has weird hobbies. ( putting makeup) If you were Coffretchi, how would you feel? lol I mean you get teased 'cause you haven't hit puberty with your voice and you like tamagotchis which makes you even weirder.
Overall, She's pretty cute. Even though she may have replaced Himespechi, a fan-favorite character, she still deserves respect even if she isn't real. It's like disrespecting Bandai Japan too you know