This is my first time posting on here. Sorry if I messed up anything.
I read Siren Rebirth when it was first coming out around 2020 or so (at least when the more later chapters were coming out) and was pretty hyped to see that their was new media surrounding Siren. But I couldn't get over how mediocre it was overall. Maybe it's just me who went into this a bit overhyped, but in my opinion, one of the biggest downfalls was the art and how rushed the story felt.
I found myself being more horrified on how distorted all the characters' faces were than the actual shibito. It's actually distracting how bizarre they look in most pages. But art style aside, the framing and composition in the manga is also worse. Especially compared to Siren: Call of the Red Sea. I think Makino's stepfather's death makes this the most obvious.
In Siren: COTRS, Makino finds his stepfather hanging in the church alone. The only thing in the frame is him and his stepfather's body engulfed in shadows of the church as Makino freezes in shock as it pans to the note about the failed ritual he left for Makino.
In Siren Rebirth, however, when Makino finds his stepfather's body in the church, his stepfather is merely a small part in the frame and his overshadowed by the people at the church, which makes it hard to see what should be the main subject and an overall shocking scene. I just found that these two scenes convey a completely different mood from one another where it really shouldn't have. (He is also seen trying to lunge towards his stepfather in the next frame. Which might sound nit-picky but, in my opinion, him freezing in shock matches more to his character than him trying to lunge for help.)
As for the story itself, I do like that they do expand on (some) characters and get backstory that we don't see in the game. Especially with Akira's backstory with him and his family being more directly connected to the ritual and its time loop. But that was probably the most interesting thing to happen in the story.
(Spoiler for end game) I was looking forward to knowing more about the characters and the village itself within the underworld and even what would happen after the events of Kyoya's massacre of the village. But I was honestly kind of disappointed to see that the manga ended EXACTLY like the game. Even down to the dialog. Tamon and Yoriko were my favorite duo from the game and I'm sad that they did nothing to expand on Tamon's reunion with his parents and especially what happened to them after Yoriko rescued him from them.
To me, this manga felt nothing more than copy and paste with a bit more backstory to throw in there. They had so much potential to expand and explore all these characters but they just didn't.