While values, etc. can be selected in the Wikidata Query Service in Skolt Saami, its funky characters do not get displayed in the actual query (without fixing them first):
IMO these should be transferred seamlessly to the code and not require editing. So ?_i_llmainstee_ji_mie_rr should actually be ?ǩiõllmainsteeʹji_mieʹrr without editing it.
(Not sure if this is a bug or a feature.)