Name: Wander & Sylvia
Quote: “Aw, Syl. It never hurts to help!” “Do you have any idea how many times you say that immediately before we actually get hurt?”
Description: Wander and Sylvia travels around the universe to the battlefield, ready to fight the enemies and help their team.
Role: Support
Position: Front
Stars: 
Team: Red
Normal Attack: Sylvia will roundhouse kick the enemy.
Entrance: Sylvia will run to position with Wander riding on her
Victory: Wander will stand on top on Sylvia, playing his banjo, both smiling at each other.
Defeat: Wander will make a sad expression in his face, putting his hands in his face with Sylvia folding her arms with her angry face.
White Skill: Head Charge
Fantastic Damage
Wander will get out his orbble juice from his hat and create a bubble around him and Sylvia. Sylvia run across the battlefield, dealing knockback and X damage.
Green Skill: Musical Charm
Wander gets out his banjo and plays it, healing his teammates X HP and charming the closest enemy.
Blue Skill: Power Of Love
When Wander & Sylvia reached 50% of HP per wave, Wander will hug her, healing themself and allies X HP and increasing their attack speed by X% for the rest of the wave.
Purple Skill: Always Sunny Somewhere
“Musical Charm” and “Power of Love” will now heals more HP to Wander, Sylvia, and their team.
Red Skill: Ride On
“Musical Charm” removes any active debuff that Wander & Sylvia has, healing themself X HP instead. And every 3rd basic attack Wander & Sylvia or an ally does, deals a small knockback to the enemy.
Additional Boost:
- +X Max HP
- +X Skill Power
- +X Basic Damage
Friendships:
Wander & Sylvia/Miguel
Stringed Concert
Allies: Animal, Miss Piggy, Dr. Facilier
“Musical Charm” Buffs
- +X Max HP
- Allies healed by “Musical Charm” gain X armor and X reality for X seconds
- +X charm duration
Wander & Sylvia/Queen Of Hearts
Royal Highness
Allies: Mad Hatter, Merlin, Timon & Pumbaa
Start Wave With Strong Team
- +X Basic Damage to allies
- During each wave, Wander & Sylvia and their allies start the wave with X basic damage and skill power for X seconds
I didn’t see any references in DHBM relate to Wander Over Yonder. But this show is part of Disney and it is a popular show, even it got cancelled. But they will look great in the game. And again, more character concepts on recommending Disney characters coming by.