In Jn 8:44, Christ says the devil was a murderer & a liar from the beginning, therefore Ezek 28:15 can’t be talking about satan.
John 8:44 Ye are of your father the devil [false accuser], and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him.
Ezekiel 28:15 Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee.
The truth is, satan is not a fallen angel, none of the angels (celestial beings) sinned, Ezekiel 28:13-17 is talking about a man, the king of Tyrus, not a fallen angel.
Angels were created to obey God, therefore none of the angels (celestial beings) sinned. Satan, the Devil is not a fallen angel, and demons are not fallen angels.
Psalm 103:19 – The LORD has established His throne in the heavens, And His sovereignty rules over all.
103:20 – Bless the LORD, you His angels, Mighty in strength, who perform His word, Obeying the voice of His word!.
103:21 – Bless the LORD, all you His hosts, You who serve Him, doing His will.
Hebrews 1:14 – Are not the angels all ministering spirits (servants) sent out in the service [of God for the assistance] of those who are to inherit salvation?
Satan isn’t a fallen angel https://bornfromabove7.wordpress.com/category/satan-is-not-a-fallen-angel/
Demons are not fallen angels https://bornfromabove7.wordpress.com/category/demons-are-not-fallen-angels/