So basically Virgil is having a full blown panic attack and Janus comforts him by turning into different sides. And that's why he sounds like multiple people in the song

Janus as Patton (JAP)
Janus as Logan (JAL)
Janus as Roman (JARO)
Janus as Remus (JARE)

Janus as some fusion between everyone: Oh it's alright oh

Virgil: oh hey.. I had a night, I had a day, I did one million stupid things, I said one billion foolish things. I'm not ok. I got a baseball beside my bed. The fight I fought inside my head. The fight I had behind my meds. I'm only lost in pain..

JAP: It's alright it's ok

JARO: It's alright it's ok

JAL: You're not a monster. You're a human.

JARE: That you made of your mistakes
It's alright, it's okay, it's alright, it's okay

JARO: You're not Grouse, you're just a human that you've made of your mistakes.

Janus as some fusion between everyone: It's alright, oh
It's okay, oh

Virgil: Goddamn
I've thrown a brick right through the window
My life ignored the signals
I am high and drunk on ego
Can't see straight
So I just feel my way around man
I am touching, I am grabbing
Everything I can't be havin'
I am broken down in shame

JAP: Its alright it's ok It's alright it's ok.

JARE: You're not a demon

JAL: There's a reason you behaved in that way.

JAP: And I believe, yes I believe
That you will see a better day

Janus: It's alright.

Janus as some fusion between everyone: oh
It's okay, oh
It's alright, oh

Virgil finally calming down: I don't wanna know who I am
'Cause heaven only knows what I find
I don't wanna know I'm not capable of coming out alive
I don't wanna see what's inside
I think that I would rather be blind
I don't wanna know I'm not capable, I'm capable

Virgil completely calmed: I'm alright, I'm okay, I'm alright, I'm okay
I'm not a monster, I'm a human
And I made a few mistakes
I'm alright, I'm okay, I'm alright, I'm okay
I'm not grouse, I'm just human
And I made a few...

Janus cuddling Virgil and using all the voices of the sides: It's alright, it's okay, it's alright, it's okay
You're not a demon, there's a reason
You're behaving that way
It's alright, it's okay, it's alright, it's okay! And I believe, yes I believe
That you will see a better day
It's alright, oh
It's okay, oh
It's alright, oh
And I believe, yes I believe
That you will see a better day

Janus whispering to Virgil: It's alright