Sencha mac Ailella explained

Sencha mac Ailella is a character from the Ulster Cycle of Irish mythology.^[1] He acts as an important judge and notable poet during the reign of Conchobar mac Nessa.^[2] He volunteered to foster Cúchulainn, but was only an educator.^{[1] [3]} Sencha helped establish peace between the Ulstermen.^[4]

Sencha's face broke out in "blotches" when giving a misogynistic judgment. They were a consequence of a spiritual or magical ban that compelled him to behave fairly. His face was later healed when Brigit convinced Sencha to reconsider his judgment.^[5]

He has been compared to Nestor of Homer's Iliad and Merlin of the Arthurian Legends.^[1]

References

1. Web site: Sencha mac Ailella. About.com. 8 February 2010.
2. Book: Maier, Bernhard. Dictionary of Celtic Religion and Culture. Boydell Press. 1 April 2000. 352. 978-0-8160-4524-2.
3. Book: Monaghan, Patricia. The Encyclopedia of Celtic Mythology and Folklore. Facts on File. January 2004. 108. 978-0-8160-4524-2.
4. Book: John, Matthews. Caitlin Matthews . The Encyclopaedia of Celtic Myth and Legend: A Definitive Sourcebook of Magic, Vision, and Lore. The Lyon Press. 1 March 2004. 512. 978-1-59228-302-6.
5. Book: Monaghan, Patricia. The Encyclopedia of Celtic Mythology and Folklore. Facts on File. January 2004. 56–57. 978-0-8160-4524-2.