What stood, or rather, floated, in front of Eiro was a figure of vast power. Especially here in this realm, where her abilities and magic were the most potent, the Naiad Queen was formidable. If Eiro had lower willpower than he did, then he would certainly buckle in front of the figure that he was seeing.
Things weren't linking up quite right. If Eiro remembered correctly, and he always did, then Nelly was supposed to be just a common Naiad... of course, her personality was unlike almost any Naiad out there; her willingness to form a contract that differed so strongly from the norm was something extraordinary. But in any other sense, in the societal hierarchy of Spirits, and within her personal history, Nelly should have just been an ordinary spirit.