Cavalier (5e Creature)
From D&D Wiki
Medium humanoid (any race), any alignment
Mounted. The cavalier rides atop a riding horse.
Mounted Combatant. While the cavalier is mounted and isn't incapacitated, it has advantage on melee attack rolls against unmounted creatures smaller than its mount, can force an attack targeted at its mount to attack it instead, and when its mount is subjected to an effect that allows it to make a Dexterity saving throw for half damage, the mount instead takes no damage on a successful save and only half damage on a failed save.
Longsword. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) slashing damage.
Spear. Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 5 (1d6 + 2) piercing damage.