S'yne's Sister

S'yne's sister is a powerful member of the organization behind the waves and is often seen with the vanguards of the waves testing their new technology.

Appearance
S'yne's sister is a mature woman with striking cream-colored hair. She is relatively tall and quite beautiful. She wears highly revealing clothing with large buttons placed in random places. Her clothing design is very similar to S'yne's although it also uses a fur material. She also has the same cool, collected demeanor as S'yne.

Personality
Beneath her cool demeanor, S'yne's sister hide a sadistic side. She loves to torment others, including her own sister, for her own enjoyment. She is completely confident in her abilities and has the skills to back up that confidence. However, her true motives are unknown. While she likes to test new technology against the Heroes, she also gives hints to Naofumi and the others on how to beat them - even at her allies' expense. She has even gone to the point of letting her own allies lose for the opportunity to let the heroes to grow. When Naofumi's Village was hit with an experimental weapon, S'yne's Sister tried to warn him to get out before the weapon took effect.

Compared to other women in the organization behind the waves, Lyno found her to be a relatively kind and decent person. She wasn't totally obsessed with gaining power or defeating heroes. However, this doesn't show when she is "in the field".

Background
S'yne and S'yne's sister were both Vassal Heroes from the same world. However, despite being a Vassal Hero, she joined the self-proclaimed leader who was taking advantage of the waves. Together, they destroyed her own world. From then on, she joined her leader to control the Holy Heroes the leader's world. When most of the heroes were killed and the last one was caught by a terrorist group, Malty and her group joined forces so the last hero wouldn't be killed and the leader's world would remain intact. Earning the leader's respect, Malty and her group were put under S'yne's sister's care.

Trivia

 * It is hinted that S'yne's Sister's name may be M'yne.