O4saken, you are too fast for me ... I just managed to build kneeboots, recolored the ballet tights and did a strapless bodysuit (+ NormalMaps for suit and boots and there will be a non-costume version for the repo also).
And I started with the ivy leaf using the ivy-generator of Blender. I had some trouble with the scale in the beginning. But I managed it by scaling down the MakeHuman character (10:1), then I created the ivy and after all I resized only the ivy back to the normal size and reloaded the female without helpers.
But I'm not yet satisfied with the result (texture problems etc), but for today I will give up. Maybe I need also to create some arm sleeves and will recolor the hair, when my character is doing the cosplay pictures.
So I'm sorry, no rendered picture. I only add a picture from MakeHuman to show "evi goes ivy"
in construction mode. I hope there will be more at this weekend. I will then also use your "flower-weapon".