Artorius, Captain of a Thousand Blades

Formation Tactics. Artorius has advantage on saving throws against being Charmed,  Frightened, Grappled, or Restrained while they are within 5ft. of an ally.

Spellcasting. Artorius is a 4th level spellcaster. His spellcasting ability is Charisma (spell save DC 16, +8 to hit with spell attacks). Artorius has the following Paladin spells prepared:

1st level (4 slots): Bless, Compelled Duel

2nd level (3 slots): Divine Burst, Angelic Rebuke

3rd level (2 slots): Crusader's Mantle, Echoing Smite

4th level (1 slot): Death Ward

Multiattack: Artorius makes two attacks.

Longsword: +9 to hit, reach 5ft., 1 target. Hit: 15 (1d10+5) Slashing damage.

Battleaxe:  +9 to hit, reach 5ft., 1 target. Hit: 13 (1d8+5) Slashing damage.

Spear: +9 to hit, reach 5ft., range 20ft./60ft., 1 target. Hit: 11 (1d6+5) Piercing damage.

Dagger: +9 to hit, reach 5ft., 1 target. Hit: 9 (1d4+5) Slashing damage. 

Channel Divinity: Hold The Infernal. Artorius presents his Holy Symbol and every fiend within 30ft. of it that can hear it must make a CHA saving throw (DC 16). On failure, the creature is paralyzed for one minute.

Parry. Artorius adds 3 to his AC against one melee attack that would hit. To do so, Artorius must see the attacker and be wielding a melee weapon.

Riposte. Whenever Artorius gets hit with a melee attack he can use his reaction to counter attack the target that attacked him. To do so, Artorius must see the attacker and be wielding a melee weapon.

Blade Swarm. Artorius channels his magic into his weapons, sending them flying towards the target in a swarm of steel. The target must pass a Dex saving throw of 18 or take 1d10, 1d8, 1d6, and 1d4 of slashing/piercing damage on a hit.