A platonic relationship.
Millerna was in love with Allen, who shows only a brotherly love towards her. Eries, second princess of Asturia, is aware of this, and warns Allen about putting another sister through heartache. Millerna runs after Allen after he is exiled from Asturia as a traitor, leaving her father's kingdom. Millerna is also aware of Hitomi's feelings for Allen, but considers Allen to be 'too far out of her league'. Later on, Millerna has conflicting feelings about Dryden and Allen. Near the end, the relationship metes out into a platonic one: Each one showing concern and love for one another, but not the passion between two lovers.