Suiyan
Dunno whats your later aim of this story but if light goes with life than darkness should go with death, And death often goes with necromancers so using that with life they should be able to create sentient puppets. Or in broader aspects death/darkness can be the living flesh while light/life be the soul so they could be playing mini gods by creating life. Dont mind me im just bored :D
Malaka is a kid with a super competitive streak, so her actions are somewhat understandablee. Just like Rean & Roan are rival brothers, Malaka looks at them as her rivals and goals to reach the next level. She's 8 and not a reincarnation, so I like her for that and that she has ambitions towards being better than she is. She has no problem working towards that goal either, so I don't really get why people are like hitting on her. She learns as she makes her mistakes and is likely to be stronger for it.