The cosplay is stuck in deep sticky mud

I tried to cos a certain character, but I replaced the mid-calf boots with patent leather thigh-high boots. Is there anyone willing to guess who it is? When I went there last night, there was a lot of water, so this time I only played in a small area with higher ground. The ground there is very hard. I've been there before, but I never got stuck. However, this time I wore high-heeled thigh-high boots, so I easily sank into the mud. But it seems that the mud is only as deep as my upper thigh because I seem to have stepped on the bottom.​