Because I have so much time on my hands, I made this. If you click keep reading, you can read more about the characters featured in Melonade Multiverse.
Homestar Runner - The main protagonist and playable character of Melonade Multiverse. He dressed himself up as bartender because he's gonna do a Pizza Tower inspired tale. He scales a tower filled with melonade and universe portals while trying to stop Strong Bad.
Strong Bad - The main antagonist of Melonade Multiverse. He sent Homestar an invitation to his tower just so he can win once and for all. He also serves as the "Pizza Granny" to either help with controls or just express random thoughts in his head. He is also the boss of Level 1-Boss and Level 5-Boss. After beating the game with all of the Secret Treasures, he becomes playable.
The Cheat - Appears in Phase 2 of Strong Bad's boss battle in Level 1-Boss and the entirity of Level 5-Boss as Strong Bad's helper, trying to get rid of Homestar. After beating Level-1 Boss, he can be found in Floor 4 smoking. He and Strong Mad replace Pom Pom when playing as Strong Bad.
Strong Mad - Appears in Phase 2 of Strong Bad's final boss battle as Strong Bad's other helper, as well as the older brother. He and The Cheat replace Pom Pom when playing as Strong Bad.
Strong Sad - Strong Bad's younger brother, trapped in Floor 2 until its Boss level is bought. He serves as the only playable character in Level 2-Boss trying to revive Homestar after the latter ends up falling victim to Strong Bad in a cutscene. After beating Level 2-Boss, you can play as him in other levels, and play as Homestar in Level 2-Boss to retrieve random colored rocks.
Pom Pom - Homestar Runner's best friend, possibly why he takes on the role of Gustavo and Brick. He has playable sections in a select few levels.
Marzipan - Is an unlockable playable character, unlocked after beating Level 1-Boss.
Coach Z - Homestar Runner gets kidnapped upon entering the Level 3-Boss gate for the first time, letting Coach Z serve as the sole player character in Level 3-Boss against Animatronic Strong Bad. After beating Level 3-Boss, you can play as him in other levels, and play as Homestar in Level 3-Boss to rematch Animatronic Strong Bad.
Bubs - Sells things, including "boss levels." The role of Mr. Stick has never been more fitting for Bubs. He serves as a replacement for Pom Pom when playing as Coach Z.
The King of Town - Is an unlockable playable character, unlocked after beating the game for the first time.
The Poopsmith - Serves as a replacement for Pom Pom when playing as the King of Town.
Homsar - The Melonade Multiverse's "secret eyes." If a player character interacts with him, he will send them to a secret area. Getting 101% unlocks him as a playable character, with his moveset randomized, though he defaults to Homestar's moveset if he's not in a level.
Champeen - Serves as a replacement for Pom Pom when playing as Marzipan.
Homestar-Runner.exe - Despite the name sounding like a Sonic EXE clone, he's actually a robot version of Homestar Runner, challenging his inspiration to a race in Level 4-Boss. After beating Level 4-Boss, you can play as him. He plays almost the same as Homestar Runner gameplay-wise.