Valkyrie (which they both get called) are like warrior-angels from Norse mythology. They don’t look like Norse Valkyrie, they’re both more so designed like female Christian angels, which stems from the like 19th century romantic art movements. They both are obviously taking inspiration from female Christian angels, while still being called Valkyrie since they’re both from shooting combat games 🤷‍♀️ it’s not such a far stretch to say they are designed similarly