I’m not sure. I would have to think about it.
I’m thinking the Son Of Man would be human(s) — from Adam. I’m thinking the Holy Spirit is God. Some say the only “unforgivable sin” is rejecting/speaking against the Trinity.
But “either in this age or in the age to come” is interesting. Hmmm...
I know there are others on the site who are MUCH more knowledgeable than I am. I did attend Seminary for Church Music, but took only the required basic Bible courses. Those in the Divinity program did the deep dive.
Fair enough...