Definition of pipe for English Language Learners. : 1  a long, hollow tube for carrying water, steam, gas, etc. : 2  a tube with a small bowl at one end that is used for smoking tobacco. : 3  a musical instrument that is in the shape of a tube, has holes along the top, and is played by blowing.
The Blood of Olympus (mentioned) Lupa is the immortal Roman wolf goddess who trains Roman demigods in the ways of Rome. She trains the demigods at the Wolf House, then sends them to Camp Jupiter where they can join the Twelfth Legion.
Ygritte is a wildling woman known for her red hair. She is fierce and headstrong. In wildling culture she is known as a spearwife: a woman who is also a warrior. Ygritte is not a point of view character in the novels, so her actions are witnessed and interpreted through the eyes of other people, such as Jon Snow.