Complex sentence: Out of his suit, he is seen as very fragile and begs Ben not to leave him as he will surely die in Earth's atmosphere without his suit and it should be noted that he says that he is over a billion years old.
Split into simpler sentences: Out of his suit, he is seen as very fragile and begs Ben not to leave him as he will surely die in Earth's atmosphere without his suit. It should be noted that he says that he is over a billion years old.