As a Bonus Action, regain 1d10 plus your Fighter level hit points. She uses this sparingly, like a veteran rationing pain.

Whenever she uses Second Wind with a Bonus Action, she can move up to half her Speed without provoking opportunity attacks.

A tactical feint with her blade or sidearm, using precision to create an opening.

A brief burst of movement that carries her from cover to cover without exposing herself longer than necessary.

A cold, professional command voice that can snap allies back into formation or make a lesser opponent hesitate.

Choose a Fighting Style feat, such as Defense, to define your martial technique. Karina fights like someone who expects to be outnumbered and wants the math to favor her.

She knows three weapon masteries of simple or martial weapons and can change one after a Long Rest. Her weapon handling is deliberate, practiced, and adaptable.

Take one additional action on your turn, except the Magic action. At level 17 this can be used twice before a rest, though only once per turn.

When she fails an ability check, she can expend Second Wind to add 1d10 to the check instead of healing. If the check still fails, the use is not spent.

At level 3 she chose the Champion subclass, becoming a specialist in relentless physical excellence.

Her weapon attacks score critical hits on a 19 or 20 on the d20.

She has advantage on Initiative rolls and Strength Athletics checks, and when she scores a critical hit she can move up to half her Speed without provoking opportunity attacks.

Gain the Ability Score Improvement feat or another feat you qualify for.

She attacks twice when she takes the Attack action.

Gain another Ability Score Improvement feat or qualifying feat.

At level 7 she gains another Champion feature, reinforcing her relentless combat style.

Gain another Ability Score Improvement feat or qualifying feat.

If she fails a saving throw, she can reroll it with a bonus equal to her Fighter level. She regains this after a Long Rest, and uses increase to three per Long Rest at level 17.

When she attacks with a weapon whose mastery she can use, she can replace that mastery with Push, Sap, or Slow for that attack.

At level 10 she gains another Champion feature, sharpening her battlefield instincts.

She can attack three times instead of once whenever she takes the Attack action.

Gain another Ability Score Improvement feat or qualifying feat.

Indomitable can be used twice before a Long Rest, and Studied Attacks gives her advantage on the next attack roll against a creature she missed with before the end of her next turn.

Gain another Ability Score Improvement feat or qualifying feat.

At level 15 she gains another Champion feature, continuing her subclass progression.

Gain another Ability Score Improvement feat or qualifying feat.

Action Surge can be used twice before a rest, and Indomitable can be used three times before a Long Rest.

At level 18 she gains the Champion's highest-tier resilience feature.

During combat, she can give herself Heroic Inspiration whenever she starts her turn without it.

Gain an Epic Boon feat or another feat you qualify for.

She can attack four times instead of once whenever she takes the Attack action.

At level 18, she gains advantage on Death Saving Throws. On a 18 to 20, she treats the roll as a 20. If bloodied and at least 1 HP, she regains 5 plus her Constitution modifier HP at the start of each of her turns.

Karina knows how to move through military spaces, read rank and procedure at a glance, and secure the cooperation of armed professionals who still respect discipline. She can usually find lodging, transport, or practical aid from soldiers, mercenaries, and veterans who recognize her training and bearing.