This is Lotus, the 4th main character on the Saykats side though this is the first full pitcure of her so some things are subject to change later (like the sheat of her sword)
Also she is the first drawn elder sayakat Elder doesent mean old for sayakats, elder means they are past the age of 32 and have grown to their full sizes, and have also mastered one combat style
also elder sayakats usually wear formal clothing, or thier armour, unlike younger sayakats
Lotus tends to have quite a bittter personality, but more on her info later.