It's often that 'We' talk about pronouns. "He", "She", "They", "Them", "Him", "Her" ,"Their's","His", "Her's".
What about prenouns? A pronoun is proactive. It's talking about another. What about one that's only for yourself?
"I", "We", "They", "I'm", "We're", "They're" "I'll", "We'll", "They'll".