What exactly are you looking for here? No one in this thread is going to be able to tell you what St. Michael’s personality is like, or whether St. Gabriel likes to swim. There are several things that we know, as revealed in Scripture and interpreted by the Church and various Saints.
Angels are purely spiritual beings. They exist in eternity, though they are not eternal, as they all had a beginning.
Being pure spirit, with no body, not being subject to time, their will is also not subject to change. They have free will, but as they are pure spirit existing outside of time, there is no vacillation in their choices. Angels are presented with full knowledge and full understanding of the consequences of the choice they made, which is the choice we all face. Do I serve the will of God, or do I serve myself? 2/3 of the angels chose correctly, and having done so with full understanding and consent, reside eternally in Heaven with God. 1/3 chose incorrectly, with full knowledge and full consent of will, to oppose God’s will in favor of their own. These angels are known as demons, and like the souls in Hell, separated themselves eternally from God.
This is why an angel in Heaven will never change its mind. They can, as they still have free will, but their will is oriented towards God eternally, as are those of the saints in Heaven. After having perceived the Beatific Vision, they have no desire to leave God’s presence. Conversely, demons also will not change their minds. Just as a person who dies in a state of mortal sin has eternally oriented their soul and will against God, a demon has, with full knowledge and full consent, committed mortal sin and eternally rejects God.
We know that angels are organized in a hierarchy, which was explored in detail by St. Thomas, based on Scripture and logical analysis.
And to answer the OP’s question. The angels do not need to be elevated. The angels are like human souls who are already in Heaven, and we have 3 whose names have been revealed to us, namely Michael, Raphael, and Gabriel. They are considered Saints because, like the saints, they reside in Heaven in the presence of God. Thus they can intercede for us.
But, unlike even the saints, the angels do not have and have never had original sin, as they are not subject to time and don’t have bodies. Original sin is a consequence of human disobedience to God’s will. Unlike angels, humans are both body and soul. We are not pure spirit, and intrinsic to our nature is our body, which means we are a union of body and soul, not a soul with a body or a body with a soul. Who and what we are is the two of those things in union, which is why we are subject to time, and also why we will be resurrected on the last day. Our will is free, but as we are mortal, it is not fixed. When we commit mortal sin, it is done with full knowledge and full consent, but until our deaths our will itself is not fixed. As our bodies are subject to time, our will is subject to change while we still live. We can go to Confession to be forgiven for our sins, which is an act of will on our part that orients our souls back to God, and an act of Grace from God bestowed on us to return us to communion with Him.
Someone please correct me if I’m wrong about any of this.