Characters - Sonic Forces Guide - IGN

There are a bunch of classic Sonic the Hedgehog chaarcters that make an appearance in Sonic Forces. Besides your custom Avatar, you'll see and run into

Character Creation - Sonic Forces Guide - IGN

Sonic Forces: Speed Battle Tier List (Updated) : r/SonicTheHedgehog

Sonic Superstars, Sonic Wiki Zone

Green Hill - Virtual Reality - Sonic Forces Guide - IGN

City - Enemy Territory - Sonic Forces Guide - IGN

Sonic Forces Character Customization - Colaboratory

Sonic Forces Walkthrough - Infinite 2nd Boss Battle

Stage 3 - City Ghost Town - Sonic Forces Guide - IGN

Tips and Tricks - Sonic Forces Guide - IGN

Sonic Forces lets you create your own anthropomorphic avatar

Sonic Forces Character Customization Explained