Lock Character & Style Consistency with Reference Images

I'm making a series of images that share one art style and one recurring character (avatars, covers, sticker packs, etc.). Help me turn this into an image prompt and spell out: 1) the character's fixed traits (hair, outfit, color palette — as specific as possible); 2) consistent style keywords (e.g. flat illustration / painterly / photoreal); 3) change only the scene or pose per image while keeping everything else fixed; 4) how to do this with style/character references in Midjourney (sref, cref) and by uploading a reference image in Jimeng or Nano Banana. My character is: [describe], and the scenes are: [list 3-5 scenes].

我要做一组画风统一、同一个角色的系列图（头像、封面、表情包等）。请帮我把需求写成一段出图提示词，并明确这几件事：1）主体角色的固定特征（发型、服装、配色，越具体越好）；2）统一的画风关键词（如「扁平插画 / 厚涂 / 写实摄影」）；3）每张图只改变场景或动作，其余保持不变；4）告诉我在 Midjourney 用风格参考 / 角色参考（sref、cref），在即梦或 Nano Banana 上传参考图，分别该怎么操作。我的角色是：[描述角色]，要画的场景是：[列出 3-5 个场景]。