Body Guard

 Cautious. The bodyguard has advantage on Wisdom (Insight) and Wisdom (Perception) checks to detect creatures hostile toward a creature this bodyguard is guarding. If the bodyguard is entering combat while within 30 feet of the creature it is guarding, it has advantage on its initiative roll.

Payback (1/Turn). When a creature the bodyguard is guarding is damaged by a creature or vehicle, the bodyguard's next attack against the creature or vehicle that damaged them has advantage and, if it hits, it deals an extra 2d6 damage.

Mean Muscle. The average bodyguard is already cranky from having to deal with the whims of their pampered VIPs on a daily basis. As such, they don't need much of an excuse to want to break some punk's nose if they look cross-eyed at them or their client. The best bodyguards in the business gain a reputation of brutality and cruelty toward whoever offends their clients.

Watchful Guardians. More than just a muscle wall for their clients, well-trained bodyguards are capable of identifying hostile intent by body and eye movement. If there's a threat to their client, they move swiftly and act with extreme prejudice toward any who would dare to harm their payday.

Multiattack. The bodyguard makes two weapon attacks.

Blade. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6+4) slashing damage.

Magnum. Ranged Weapon Attack: +6 to hit, reach 70/280 ft., one target. Hit: 9 (2d8)  piercing damage.

Enter the description for how bonus actions work for your monster here.

Get Down. When a creature the bodyguard can see makes an attack against a creature the bodyguard is guarding, the bodyguard can move up to half its movement speed. At the end of this movement, if the bodyguard is within within 5 feet of the target of the attack, it can force the attack to target the bodyguard instead. This movement doesn’t provoke opportunity attacks.