Wendy, She Who Fells Kings and Court Jesters

Legendary Resistance. 3/day. When Wendy fails a saving throw, she can choose to succeed instead. 

Magical Resistance. Wendy has advantage on saving throws against spells and magical effects. 

Rival Corporation. Whenever Wendy makes an attack against a creature aligned with a different fast food chain, she can copy one of the abilities or spells of that creature and use it to stay competitive in the fast food market. The rules of that ability including timing and damage are unchanged. A spell uses the casters ability modifiers and Save DC.

Action Surge. 1/Short Rest. Fueled by nothing but spite and vanilla frosty, Wendy takes an additional action.

Multiattack. Wendy can make three Greatsword attacks, or two greatsword attacks and one Javelin attack.

Greatsword. Melee Weapon Attack: +13 to hit, reach 5 ft., 1 target. Hit: 28 (3d12 + 7) magical slashing damage. 

Flag Javelin. Ranged Weapon Attack: +12 to hit, range 30/60 ft., 1 target. Hit:  16 (2d8 + 6) magical piercing damage.

Dash. Fueled with malice, Wendy dashes 30 feet toward a creature aligned with an opposing fast food chain, not provoking any opportunity attacks.

Wendy has 3 Legendary Actions and regains them all on her turn.

Whirlwind (Costs 2 Actions). Wendy whips around in a furious circle, dealing 35 (4d12 + 7) slashing damage to each creature within 10 feet of her. 

Attack (Costs 1 action). Wendy can use a greatsword attack or a javelin attack.

Rival Corporation (Costs 3 actions). Wendy can use a stolen ability from her 'Rival Corporation' ability, ignoring all timing restrictions. 

Dash (Costs 1 Action). Wendy can use her Dash ability.