samkranti planning

arrietty will have mud on her feet, to show her guilt for forcing her family to move houses

sirius is another story

i'm not sure if he'll just reek of dark magic because of his family

or something to do with leaving Regulus with their parents

that is definitely his worst guilt, but that's not easily communicated with stains

hmmmmmm!

actually, the worst canon guilt sirius has is sending severus down the under the whomping willow!

so his hair might turn greasy like Snivellus' :>