Anthropomorphic blue hedgehog with supersonic speed, seeks friendship and protects Earth.
They become the central heroic partnership.
Sonic convinces Tails to help him find the Master Emerald, and they later fight alongside Knuckles against Robotnik's giant robot.
They begin as opposing claimants to the Emerald.
Sonic fights Knuckles at the underwater temple to stop him from taking the Master Emerald.
Their rivalry drives the main conflict.
Dr. Robotnik ambushes Sonic after escaping the mushroom planet and later uses the Master Emerald's power to attack him.
Randall temporarily acts against Sonic under his agency mission.
Randall and the wedding guests reveal themselves as undercover G.U.N. agents who set up the wedding to capture Sonic and Tails.
Walters represents the institutional threat pursuing Sonic.
G.U.N. agents set a trap to capture Sonic, and Walters oversees the organization's special operations.
Rachel intervenes against the capture operation.
Rachel joins Maddie in saving Sonic, Tails, and the arrested adult after the undercover agents reveal themselves.
Super Sonic is Sonic's empowered form.
The Chaos Emeralds transform Sonic into Super Sonic, after which he destroys Robotnik's giant robot before reverting to normal.
Explore the full interactive character relationship map of Sonic the Hedgehog 2
Related entry on Wikidata (Q191626), public domain (CC0).