Invisibility-Wan2.1-I2V-720P. You may need to try some random seed to get the best result.

Strength:0.8-1, Prompt Suggestion:

invisibility effect,character become invisible

You can use MediaInfo to check the generation info in the video. The workflow I used ComfyUI-WanVideoWrapper. I uploaded an article of my experience of training Wan2.1 LoRA (Both I2V & T2V): My Personally Training Experience of WAN:Starting with Data.