Breezeguard

Brave. The Breezeguard has advantage on saving throws against being frightened. 

Sentinel. When the Breezeguard hits a creature with an opportunity attack, the creature's speed becomes 0 for the rest of the turn. Creatures provoke opportunity attacks from you even if they take the Disengage action before leaving your reach. When a creature within 5 feet of you makes an attack against a target other than you (and that target doesn't have this feat), you can use your reaction to make a melee weapon attack against the attacking creature.

Multiattack. The knight makes two melee attacks.

Glaive. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 8 (1d10 + 3) slashing damage.

Heavy Crossbow. Ranged Weapon Attack: +4 to hit, range 100/400 ft., one target. Hit: 7 (1d10+2) piercing damage.

Polearm Master. When the Breezeguard takes the Attack action and attack with only a glaive, halberd, quarterstaff, or spear, they can use a bonus action to make a melee attack with the opposite end of the weapon. This attack uses the same ability modifier as the primary attack. The weapon’s damage die for this attack is a d4, and it deals bludgeoning damage.

Polearm Master. While you are wielding a glaive, halberd, quarterstaff, or spear, other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon.