She can equip Araahal, for the record Harkar can also use Araahal due to a hidden trait of her's that is not known in character yet, but is not a secret due to me mentioning it over on a discord.
Harkar has the following trait below. This is currently unknown in universe due to Harkar never doing ship command yet, but will become known the first time she does.
Admiral Exemplar: can only roll 30 below opposing foe, critical failures negated, rolls separately against all admirals arrayed against her, considered to have base of Tier 4 Martial when commanding ships (25), rolls Best of 2 for all naval fights, gains a degree of success the turn after her fleet takes a wound, doubles the effective wounds of her fleets