A question for all ye trinitarian specialists

Currently, I’m reading a Byzantine text called the Palaea.  It’s a collection of stories from the Old Testament, with all sorts of apocryphal legends filled in too.  The work begins with a confession of orthodoxy, but I’m a bit puzzled on what refers to Jesus, and what refers to the entire trinity.  There’s all sort of variants too, which makes it all the more frustrating.  Here’s the portion of the first paragraph:

ὁ πατηρ ὁ αναρχος απεριγραπτος απεριοριστος αγεννητος αοριστος
ακαταληπτος παντα περιεχων και περιοριζων και υπ ουδενος οριζομενος.
θεος ὁ υιος γεννηθεις παρα του πατρος προ παντων αιωνων αρευστως, επ εσχατων
δε σαρκωθεις δια οικονομιαν εκ παρθενου μητρος. ατρεπτος απεριγραπτος κατα
τον πατερα περιγραπτος κατα την σαρκα.  θεος το πνευμα το αγιον ομοουσιον τω
πατρι και τω υιω. ενεργουν τα παντα και διακρατων, διεπων, και συνεχων κατα αμφω
γαρ εν τοις τρισιν ουδε ατελες αλλα μια βασιλεια, μια θελησις, μια ουσια, εν
φως τρισηλιον, δυο φυσεις, θεοτητα λεγω και ανθρωποτητα.

The bolded part is what I’m curious about. My translation: “But [there is] one kingdom, one will, one nature, one three-fold (three-sunned?) light, two natures, I mean the divine and the human.”

The language seems to be referring to the Trinity at first. One will and one nature, in particular, wouldn’t be an orthodox confession of Jesus (condemned as monothelitism and monophytism respectively). I guess my question refers to that language in reference to the whole Trinity. Is there a common divine will among the Trinity? Or am I misreading θελησις which doesn’t strictly mean θελημα…? Why does the author switch so quickly from a confession of the Trinity to a confession of Jesus? Perhaps that’s standard fare that I’m no aware of? Any help would be much appreciated.