what makes a god (polytheism)?

True concept of God: Allah is one he is eternal he is neither born nor give birth there is nothing like him

Romans 1:20 says “.....For his invisible qualities are clearly seen from the world’s creation onward, because they are perceived by the things made, even his eternal power and Godship, so that they are inexcusable....” it’s talking about God.

And

Hebrew 3:4 says..”....Of course, every house is constructed by someone, but the one who constructed all things is God...”

well since you excluded mythology and polytheism is part of mythology, mythology does not turn into a real god so your answer to the gods question would be no answer but you said characteristics so this would be well you could say 'the traits of the gods'

1 selfish 2 strong 3 stylish 4 variety 5 real

(those would be the characteristics of potential real gods)

No one knows since no god exists

The best characteristics that define the ONE and only True God is this: Jesus the Christ of Nazareth, the Messiah, the Word, the Light is God incarnate as John 1:1-14 and His name Emmanuel reveals. <t><