战神妹儿
[zhàn shén mèi ér]
This translates to 'War Goddess Sister', implying a fierce or strong personality mixed with youthful or sisterly charm. '戦神' suggests qualities like bravery, resilience and leadership typically associated with a god of war, while '妹儿' gives off cute, affectionate nuances suggesting perhaps an unbreakable warrior at heart wrapped in a softer exterior or approachable persona.