The scriptures' antitrinitarian bias is unrelenting.

 Hebrews ch.1:1-3KJV"(Grk. Ho Theos)God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,

2 Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;

3 Who being the brightness of his glory, and the express image( Grk. kharakter)of his person(hypostasis)...." 

The Father is here identified as ho theos THE God of the O T patriarchs and prophets according to trinitarians the Father is not a God and thus cannot be the God of anyone certainly not the God of the ancient patriarchs the God of the Bible. Jesus is said to be the Kharakter of JEHOVAH'S hypostasis rendered variously nature,substance,person here is part of thayers commentary:

that which has foundation, is firm; hence,

a. that which has actual existence; a substance, real being: 

Thus the verse.3 is rendered in part this way in the NIV:"3The Son is the radiance of God’s glory and the exact representation of his being..." 

Thus the Father being the God is a God in his own right which is a real problem for the creeds which in an effort to retain an appearance of monotheism insists that none of the constituents of the trinity is a God(though being fully God) in his own right. And also a being which in trinitarian theology ought only to be true of the entire trinity itself/himself? The son is spoken of as being the Kharakter of the God's(i.e the Father's) being. Here is thayers commentary in part:

the mark (figure or letters) stamped upon that instrument or wrought out on it; hence, universally, "a mark or figure burned in (Leviticus 13:28) or stamped on, an impression; the exact expression (the image) of any person or thing, marked likeness, precise reproduction in every respect" (cf. facsimile):

Obviously the imprint is not of the same substance/nature as the seal with which it is made. The impress is an artifact of the seal not the other way around thus we find not the slightest hint of this equality between Jesus and his God suggested by Trinitarians but rather the reverse clear indications of JEHOVAH'S transcendent supremacy.