Dear Experiment 15 is a Splatoon 4 fanmade song
Sung and written by the idol Atlantica from Mix n Switch
It's a song welcoming her newest and most successful experiment being Agent 15. 2 beings (a Crab and a Jellyfish) spliced together as one into the body of a dead Inkling.

She praises and welcomes us with open and welcome but not warm arms as she explains our goal. Being to explore the rundown landmarks in order to find remnants of Commander Tartar's sanitation plan and to find a way to reverse it.

Yeah that's basically the song and DLC to Splatoon 4-

Anyways here's the (english translation) and DEMO lyrics
(Note, This song will remain unfinished and unreleased by Me)

Atlantica:

"Welcome Welcome, Glad to see you, Finally a successful one!!
I'm glad your eyes have opened and your hearts a stable beating one.

Let me explain all you need and your whole purpose in your life. Dear Experiment 15, Let me show you, Your new dull life!!

My name is Atlantica, Your mother, Creator and your new (i) guess god. I'm the one who saved you two from your old dull boring life. Your new mission is to grab some blue prints by a fierce commander!! I'll be watching from the sidelines, To see if you guys will succeed!!"

Yeah that's all i could think of
Anyways bye chat

Like, Comment and subscribe if i should make Pacifica her own song

Credits to DailyIIFanHere for giving (Aoi) her new name Pacifica.
Also i changed Atlantica's name from (Akai) to Mariana to Atlantica because, Mariana would confuse people with Marina
(They sound A bit similar okay?)