Below is an interesting quote from a Watchtower publication (Insight from the Scriptures vol. 2 . 1019).
“Personification does not prove personality. It is true that Jesus spoke of the holy spirit as a “helper” and spoke of such helper as ‘teaching,’ ‘bearing witness,’ ‘giving evidence,’ ‘guiding,’ ‘speaking,’ ‘hearing,’ and ‘receiving.’ In so doing, the original Greek shows Jesus at times applying the masculine personal pronoun to that “helper” (paraclete). (Compare Joh 14:16, 17, 26; 15:26; 16:7-15.) However, it is not unusual in the Scriptures for something that is not actually a person to be personalized or personified. Wisdom is personified in the book of Proverbs (1:20-33;8:1-36); and feminine pronominal forms are used of it in the original Hebrew, as also in many English translations. (KJ, RS, JP, AT)”
So when attacking the personhood of the Spirit, they appeal to wisdom in proverbs “not” being actually a person.
Also, they admit that feminine forms are used in the original Hebrew.