Having been "permanently" deceased for centuries after a love-fueled battle gone awry, this reborn Siren of love is very needy. Though she will always return the love energy others give her by an exponential amount, when she's away from her "Guardian" (aka Crysta), she starts to become sullen, and will eventually begin to cry if she can't reach her "anchor". Due to the circumstances of her revival, Aika has grown very attached to Crysta (and somewhat to Takuto), but currently lacks her past life's memories. However, she retains her increased physical and mental growth, and already has possession of a few powerful skills and abilities. As she is a baby, her stats are quite low, though they're equal to that of an older child rather than an infant at the moment.
Her past lover was the now-deceased Luck Guard. Any mention of him could bring about disastrous results.
As a Guard, she's able to drain any (elemental specific) energy from friends and foes alike in order to fuel her own powers. However, given that she has the ability to amplify said energy, it often isn't even a noticeable occurrence.
When Saga grew into an adult due to Aika's love energy, she became completely smitten with Saga, and asked her to become her Mate. During the resulting night, she tied Saga's soul to hers after Saga increased her powers much more, to the point where she almost lost control of her True Demon Form. She gave Saga the gift of being able to bear live children and eggs simultaneously, and is currently expecting her first 10 children with Saga. She proudly displays her given Mate Mark for all to see.
Aika's Mate Mark is that of three bright red hearts connected by the sharp edge, resembling the head plumage of some sort of bird. The Mark glows brightly whenever she's near Saga.
Because she's a Guard, her True Demon Form is already available to her. Because of this, Aika holds back a hidden animalistic side, which can make her quite fearsome in battle, and very amorous around Saga.
Much like Ceres-Romano, she can "shift" her body, meaning she can freely switch between sexes at will. Unlike Romano's ability, though, Aika's shift is temporary, and runs out the next day. She needs to have quite a build-up of energy before she can do this sort of thing, however. She also has the ability to influence anything that deals with love and pregnancy. Evidently, she's careful not to abuse her powers too much.
Now that she's almost completely matured, Aika has access to most of her prior life's abilities, and has picked up a few more with Crysta's help and growth. Though she's less likely to cry if Crysta goes missing, she's still somewhat dependent on her. However, she's placed most of her need for affection onto Saga, who she's more than happy to spoil silly. Aika has a great love for giving abilities and gifts to her family and Mates, though it seems she's willing to give gifts to other kind folk as well.
When Saga became Mates with Leif, rather than becoming jealous, she welcomed the new bond and gave the pair her blessings. Holding a soft spot for Lovee, Aika eventually bonded with Leif as well, completing their triad. In regards to Leif, she doesn't seem to mind his presence, and shows some affection towards him (since he often shows dedication for Saga). Aika seems very keen on having Saga and Leif in consistently affectionate moods, however, and often acts as the person to instigate a "mood" between them if they aren't already in one. It seems she likes seeing them get cuddly quite a bit.