Your friend that lives in this world and your world, when you finally find this world, you see that she was been here for a long time and know most things about this world, she’s max level basically. She got her armour, weapons, skills, etc from being here so long she learned how it works, she has a house full of her gear, currently is part of a war going between monsters and the humans. Her armour was from a dark king, many of her weapons are forged by demons and powerful monsters and people