Peter B. Parker or Beter (Earth-616)
AKA Spider-Man
To clear up any confusion, I am talking about the Peter B. Parker from Into the Spider-Verse.
Backstory
Peter Benjamin Parker, sometimes referred to as Peter B. Parker, is a man who in his teens was bitten by a radioactive spider and gained spider-like abilities after the dead of his Uncle, Ben Parker, to a crime he didn't stop. Peter swore to used his powers to protect the innocent as the masked superhero known as Spider-Man. Twenty two years later he became Miles's mentor after arriving to another universes by that world's Kingpin's collider.
Personality
Having been Spider-Man for over 20 years, with various setbacks in his life, Peter is left emotionally crippled and jaded as a result. He apparently copes with his problems with excessive eating as he put on some noticeable weight. Still, while initially reluctant, Peter still decides to take the young Miles Morales under his wing to teach him how to be a good Spider-Man. As Peter told Miles, being Spider-Man is not something that comes easy, but is rather something that comes from abandoning doubt and taking a leap of faith. This shows that despite all his setbacks, he is still as selfless in his "superhero work", willing to accept the responsibilities to the point of sacrifice himself to the sake for others.