Johnny's Mounted Combatant

You are a dangerous foe to face while YOU have been mounted. While you are mounted and aren't incapacitated, Your Ally gains the following benefits:

• All Attacks can be Forced upon either the Rider or Ridden(Consent is Required from the Player about to Eat the Attack)
• Advantage on melee attack rolls against any unmounted creature that is your size or Smaller
• If your rider is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails. Although, this Won't Help YOU

Your consequences are as Such:

• You aren't Slowed by the Rider as long as you have enough Carry Capacity to Hold them and their Gear.
  Saddlebags are Suggested.
• You Technically don't have to Grapple them, but you Can't use any Two-Handed Weapons as you need one Hand to keep them on you.
  This issue can be Mitigated by a Custom-Made Man-Saddle, which Will Definitely Cost More. As per your Dm's Pricing Demands though.