Rin is a magus competing in the Fifth Holy Grail War. She carries an outwardly prim and proper appearance, but deep down she can be prude and bossy, alongside claiming to make decisions based on cold and calculated logic. Despite this, she has a big-sisterly disposition for those she cares about and an incredible amount of passion, alongside a mischevious streak. Her potential as a magus is noted to be one of the top 100 in the Mage's Association in time.