Trash. 2-41
If you want good detailed action, plenty of that but IMO the only good and interesting characters is Marin as she's basically hot headed Wolverine with axes and Minoko. Ruschia was boring and most of the villains end up dying aside and not really having any personalities aside from whacky psycho murderers aside from two thus far. Also the manga doesnt do a good job of building up the baddies, its always 'Well heres the psycho murderers' and they then fight and now they're dead. Plus six volumes in, we still dont have much background info regarding the two MCs aside from few brief flashbacks explaining bits bout their personalities.
Grand Blue 1-15
I was close to not reading this with chapter 1 seemingly being a boring inspirational adventure romcom manga about diving but well, the picture should tell you enough.
This is easily one of the funniest mangas I've read and up there with Kaguya-sama. Its character interactions are grand, their expressions are demonic looking but damn hilarious to look at and the jokes are damn good. While most of the time its humor based, there are some moments here and there where we actually learning a thing or two about diving but when its not about diving, its usually about drinking, nudity and misunderstandings.
The characters are also all pretty likable too, Iori's airheadedness, Nanaka with the siscon complex and being Iori's motherly caretaker to the senior titans to Chisa's stern cold behaviour to all the bs the gang pulls and the obviously not-otaku Kitahara bro and few more that are just as likable.
My only gripe is the whole cousin thing, its the only really generic trait that the manga has that annoys me but thankfully, their cousinship thing isnt focused on too much and usually ends up in gag either way.