以下是《Scarlet Heart》的歌詞：
Verse 1:
Running for my life
I don't know what to do
With a scarlet heart
In this battle academy
Chorus:
Gonna face my fears
Take my destiny in my own hands
For the battle ahead
Gonna be the best that I can be
Verse 2:
Fighting for my honor
Defending my family name
Through every challenge
To find my own way
Chorus:
Gonna face my fears
Take my destiny in my own hands
For the battle ahead
Gonna be the best that I can be
Bridge:
Life's like a journey through fire
No pain, no gain
It's not the end of the world
As we know it now
But you can be sure
Of one thing that I'll always say
You can't beat me in battle academy
Not if you go scarlet heart on me!
Chorus:
Gonna face my fears
Take my destiny in my own hands
For the battle ahead
Gonna be the best that I can be
Oh oh oh oh oh oh oh... Scarlet heart! Oh oh oh oh oh oh oh... Best of me!
Outro: Let the battle begin! (Scarlet heart!) 勇氣の日が始まる! (Best of me!) 熱くさせる僕らの歌! (Scarlet Heart) (Battle) (Fight) (Charge) (Forward)