John 14:16–17Jesus talks about another Helper and that He may be...

John 14:16–17Jesus talks about another Helper and that He may be with the believers forever, and that Helper is the Spirit of Truth, who must be God since only God speaks the Truth. So the Holy Spirit who indwells in true believers is God.
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If you read a Greek Bible the word for helper is in the masculine gender whereas the word for spirit is in the neuter gender. The promised helper is God's active force and not a person.
John 14 | Kingdom Interlinear | Books of the Bible (jw.org)