Β, Γ, Δ, Η, Θ, Κ, Τ, Χ, and Ω aren't there, because Β ran away from the cave, Γ is dead, Δ is wounded, Η is dead too, Θ is also dead, Κ flew away, Τ is stuck in the ground, Χ is dead as well, and Ω is the planet.
Credits to @PhonicLover44, @AlfabetonsOfficial, and @MBear227 for the sprites! But the semicolon gem (which is the question mark gem in Greek) was made by @elithepidude, so credits to him as well!