Couldn't have expected anything less really; eidolons being as significant as they undoubtedly were in regards to the lore of this World. As daunting as this needle-in-a-haystack mission was turning out to be, Sephiroth rather calmly started to explore once they arrived in the village-sized archive. He wasn't about to start pouring through the books closest to where they arrived after all; that'd likely be covered by others, so he went quite significantly deeper before he turned his attention to the spines that he could read while he slowly proceeded along a shelf.

Even with great care only to pick tomes that logic suggested might bear some relevance to the illusive Tantarian, several hours later Sephiroth's found a desk to set up at; a tower of books forming on the end of it as he'd gone through them, before searching out another to look through. The irritation came somewhat in waves, though eventually leveled out into a solid determination to find something.

He's been here before after all; pouring through tome after tome in search of answers.