Protoss from StarCraft II, formed mainly using portraits, concept art, and some fan-made 3d models. I cannot promise it will work great on most models. I have been using https://pixai.art/model/1860700805730994084 with some success. I hope you have a good day! :)
Prompts that seem to have the most success: Starcraft, StarCraft, Protoss, bone ridge, claws, pose, posing, dramatic pose, no mouth, no nose, no ears, elongated head, glowing eyes, long black braids, no eyebrows, glowing eyes, bluish-grayish skin, long dreadlocks, long braids, black hair, no mouth, no ears, no nose, elongated head, fewer digits, long face,
I recommend using an 'upper body' tag as well, if you want portraits. They seem to appear with their correct digitigrade legs whilst doing full-body images.