[Coldsaturn]

? is Zayne because his last name in Chinese (Lí 黎) shares the same pronunciation with "pear" (lí 梨)
Sylus is a ? because his Chinese last name is Chè (彻) and if you change the tone in chē you get "car" (车)
The sun and moon indicate whether we're talking about a solar card (like the myth cards) or a lunar card (like the regular banner ones)