Thanks for reacting again to Phantom Siita, those girls have a lot of talent!
As for more recommendations, I suggest you react to their live version of ToT Musica, it was chosen as the audition song, and you can tell Ado knew what she did when she picked up those girls (they were still 5 members at that point)
For MVs,  look for the MV of ZokuZoku (even though you already hear it in the First Take version, this will give you the chance to experience the vocals of former member Hisui). Also 'Hanabami' , will definitely give you that creepy horror vibe.
For individual vocal focus, as other comments suggest, definitely check out their individual covers of Ado songs : Fleeting Lullaby (Moka), Gira Gira (Miu, Keith's favorite), ReadyMade (Rinka, Huxy's favorite) , Aitakute (Mona).

The lead singer, or the one featured more prominently, changes with each single. It's a rotating system. The last song featured Rinka as the center (the third singer), before that it was Moka (the first singer in this video) fpr exemple. I recommend you watch their music video.

My mom would always tell me "Don't date crazy". Sadly it never took. So, theme wise, this group is right up my alley. But, yeah, their voices are incredible. I wonder how much training they do with Ado.

Thanks for your reactions...  From left to right:  Moka 🩵 Miu 🤍 Rinka 💜 Mona 🩷

Ado has stated Rinka 💜 resonates with the mature audience and I definitely feel that...  Her voice is amazing and she has a lovely aura to her..  by Ado's words,  she's the aura of Phantom Siita 🦋

Mona 🩷 being the one Ado thought auditioned as a prank,  turned out to be highly dedicated and worked very hard to get chosen and Ado puts so much trust in her... She's the face of Phantom Siita 🦋

Miu 🤍 is the current oldest in the group,  being 4 years younger than Ado herself,  and she really is a big part of the horror...  They learn from her as well as she learns from them and it works so well...   She is the emotions of Phantom Siita 🦋

Moka 🩵 is a talented young lady and worked very hard to secure her place...  She's funny enough,  the one who doesn't like horror at all lol,  but it didn't stop her from pursuing her dream and making it to this point now...   Ado calls her the body of Phantom Siita 🦋

The more you dwell into the music,  the more enticing the horror becomes...

If you want recommendations,  these songs are centered around the individuals...

Rinka 💜:  Mo Ii Kai.??  & Readymade (full cover)

Moka 🩵: Rose Colored Moon & Fleeting Lullaby (full cover)

Mona 🩷:  Bot Bakka & Aitakute (full cover)

Miu 🤍:  Noah & Gira Gira (full cover)

Some of the best songs as a group would have to be Zoku Zoku & Conflicting...

Hanagatami is a different kind of song for them but it's still just as impactful and beautiful when these ladies sing it...

I could go on more,  but I'm too far gone into the well of horror 😅

SN:  regarding the 5th member,  her name is Hisui 💚 ( she goes by Sui now) she was referred to by Ado as the limbs of Phantom Siita 🦋..

An indistinguishable voice and a true horror fanatic...   It's sad she departed from the group but she's still present in their older MV and songs...  

Hanabami and Doppelganger were both centered around her and definitely worth a listen...

Definitely check out their music videos! Creepy unsettling vibes.
Just wanna xxxx with you, otomotachi, suki kirai are my favorites. There is also Readymade full cover song on their channel.

There are YouTube videos showing each day of Ado and her teams selection process of Phantom Siita. It gives you a real cool chance to answer some of your questions about how they were selected, the choreographed rehearsals and interaction with other candidates and the current members. There was originally 5 members but the oldest member had to resign due to personal health reasons. There are also videos of Phantom Siita behind the scenes of their venues! Check them out they are very cool! Great reaction again!

if there were any songs you particularly liked they have the full versions of the ado covers (song one and three) and studio versions of thier songs (two and four) on their youtube as well as other good songs and music videos you should check out

I don't know if it's on my end or on purpose but Keith is really quiet in relation to Huxy and the actual song in the last few reactions I've watched from you two. Regardless, keep up the good work! お疲れ様です
Your "I can see why Ado targeted these women" is pretty funny. I actually wouldn't put it past Ado to just snatch them up off the street after their auditions and throw them into a recording studio. I'm kidding of course, but she always seems to talk and act before she really thinks through what she's about to say/do in almost every less formal interview and especially in the radio show she hosted until two years ago. I can definitely imagine that she's a blast to work with, as staff and fellow artist.

I wanna say it here cuz I know you guys are pretty chill, but when I see reactions to “Just Wanna XXXX With You”, I always find it distasteful when a reactor IMMEDIATELY uses “f*ck” for the Xs. It’s just a pet peeve cuz Mona(Pink) I wanna say was around 16-17 and one or two other members were minors when this song came out, AND that has nothing to do with this song AT ALL. Because it would never connect to their retro-horror theme or concept. I never really made comments about it, but I figured I’d say it here just to get it off my chest for once