"He had come forth from the hands of God a perfect creature, happy and prosperous, guarded by the especial care of his Creator." => Adam. Adam is God's special creature, created with utmost care and love, a perfect being that was supposed to rule the Earth and be happy. His tasting of the forbidden fruit brought an end to his happiness and signaled a beginning of toil.
"like him, when I viewed the bliss of my protectors, the bitter gall of envy rose within me." => Satan. One of Satan's crucial features, which ultimately resulted in his banishment, is his envy upon all God's angels and God himself.
"A new species would bless me as its creator and source; many happy and excellent natures would owe their being to me." => God. He is the only creator and source of everything.
