Relation with Major Scale: It is the seventh degree of the major scale. For example, B Locrian contains the same notes as C major.
Theoretical Aspects
Sound Character: The Locrian scale is considered the most unstable and dissonant among the diatonic scales. Its characteristic interval is the diminished fifth (♭5), which makes the chord built on the tonic a diminished chord. It has a dark, restless, and unstable character.