I spotted a likely entry in the book, and read it intently. The twins seemed to be reading it as well, and the runes on their faces were flashing at a rapid pace. I did notice one of them would occasionally turn towards Rosa.
When I found a section on the entry with runes, I knew I had the right one. "This is it!" Lidia glanced at me as I began reading. "They're called 'water weirds,' apparently. It says here that they are creatures made of elemental water, and they spend the majority of their lives living in a body of water- a river, a lake, a sea... They usually present themselves as serpentine beings, but they are able to alter their forms at will.
"They hunt small prey- typically waiting for it to come to the water to drink, where they grab the victim and drown it prior to absorbing it whole." I blinked. "Fascinating. You might want to keep that mouse away, Kylan- he's about the right size."
The twins' heads shot up, runes flashing. It seemed I had insulted them. I kept reading. "They communicate visually via an elaborate series of runes that flash on their heads. They are generally very curious and love to learn new things. To this end, they will sometimes make themselves known to a person, whom they bond with, in order to gain more knowledge."
I looked at each twin in turn. "So that's why you went with me?" They each gave an approximation of a nod.
"Well, there's a list of runes here. Give me a minute to memorize these, and maybe we can get further with this."