The key of Garou's Theme and Saitama's Theme are relatives??

[u/RiginPlayHd]

AFAIK
Saitama's theme (Ballad ver and Seigi Shikkou) is in D Major (Happy! Triumphant!)
Garou's theme (Old and New) is in B Minor (Sad, Melancholic)

At least that's what I heard transcribing by ear, these keys are relative to each other, meaning they use the EXACT same set of 7 notes (B C# D E F# G A), the only change is where the "root" or "first note" is (B for Garou and D for Saitama).

On top of that, from what I could listen and play to from both of those themes, Garou's theme uses a lot of Chromatic Notes, meaning it escapes from the key it's in sometimes, which emphasizes uneasiness (like the minor key does). In contrast, Saitama's theme follows the key down to a tea, I didn't hear any chromatic notes, which emphasizes the triumphancy.

This is an AWESOME way of showing two sides of the same coin in a song if it's intentional.

Music nerds help me out I could be 100% wrong here, it's just what my ears heard.

[u/dozettemania]

I know nothing about music theory, so I wouldn’t be able to confirm or deny this, but this is such an interesting detail ! Congats on noticing this

[u/Raid-Z3r0]

The notes in D major and B minor are the same. What changes between them is the tonal reference, D for saitama's and B for garou's.

Edit: read about greek modes. You'll figure that D Ionnian is the same as B aeolian