The key of E minor
E F♯ G A B C D
1 sharp: F♯. Relative major: The key of G major.
The triads of the key
i
Em | ii°
F♯° | III
G | iv
Am | v
Bm | VI
C | VII
D |
The seventh chords
i7
Em7 | iiø7
F♯m7♭5 | IIImaj7
Gmaj7 | iv7
Am7 | v7
Bm7 | VImaj7
Cmaj7 | VII7
D7 |
In practice the V of a minor key is almost always major, taken from the harmonic minor: B7 (V7), which carries the leading tone D♯.
E natural minor scale
Open it in the app: 6. Harmony, in E