These samples come from a Stable Diffusion model: WAI illustrious v17, built on Illustrious XL, rendering the same Danbooru tags as NovelAI on the same seed and prompt. Use this list to check how a tag behaves on Illustrious-family models (Illustrious, NoobAI, WAI) in a local Stable Diffusion WebUI or ComfyUI; each tag's detail page lines it up against NovelAI V5 and V4.5.
Expression tags change the emotion on the face while keeping the character and composition: smile, blush, surprise, tears, wink. 119 tags are listed for ILLUST.
Place them after character and outfit tags: "1girl, solo, smile, blush". Emoticon tags (:d, ;p, :3) work as written on Danbooru.
V5 follows expression tags literally and keeps the face intact when several are stacked; on V4.5 the artist's style shapes the expression more.
The expression doesn't change.
Raise the weight or add part tags such as "open mouth" or "closed eyes".