No worries! Here are some images from the comic and descriptions from the novel.
Leiyu
At the head of the caravan was a figure dressed in a brown cloak riding a horse. He was wearing a weimao (veiled hat) to keep the sand from blowing into his face.
As they passed through the palace gate, the cloaked figure leading the caravan slowly took off his weimao, revealing a young man in his early twenties. He had gracefully curved phoenix eyes and long black hair tied in a ponytail that nearly reached his waist.
Thallios
This person dressed similarly to the king, albeit in lighter hues, and had long silky auburn hair, some of which was piled up into a half bun held together by a flame-shaped golden ornament. The hair ornament, forehead jewelry, earrings, and necklace were all adorned with rubies. On the face were two peach blossom eyes with amber irises, a delicate nose, and softly curved lips.
Note: Visual guide to what "phoenix eyes" and "peach blossom eyes" look like can be found here: https://twitter.com/zeldacw/status/1367636105189715968?s=20