The Dwarf’s name should NOT be translated as Riku. The original text says リケ so it should spelled Rike or Rikay; not Riku (リク), thats a different letter.
The LN illustrations also spell her name in English as Rike, but サーミャ name is spelled Sameya in the LN so take from that what you will. Either way, Riku is a misreading of her name