Old Man Blue

Old Man Blue is a Human and the head librarian at Tier 3. He is a non-player character.

Background
Old Man Blue has been at Tier 3 for decades, and his position as Head Librarian presumably led Alejandra to the organization. What tier he studied in is unknown, although Mind can be assumed based on his position: he was presumably a wizard, as he written compendiums of spells which are available to publish in the library.

It seems likely Blue was not a very good spellcaster: he is not a Headmaster, despite his longevity within the organization, and his books, which include "20 Spells Whose True Effects You Won't Believe", are poorly written and appear to exist to gain readership.

Tier 3
When the party first entered the library, Old Man Blue swiftly removed them due to River's arguing with him when she should be using her "library voice", which he granted them all a lifetime ban for. He grudgingly relented upon being approached by the Headmasters. During the banned period, Bingle still snuck in and acquired books secretly, including one by Blue himself.

Old Man Blue was present at the time the bomb threat was announced, and remained at Tier 3 until the puzzle was solved. However, he made few attempts to intervene in favor of solving the riddle, occasionally conferring with the Headmasters but mostly only becoming more standoffish.

It is not known whether Old Man Blue is involved in his granddaughter Alejandra's arranged marriage, and if so, if he is of royal blood.

Personality
Old Man Blue is grumpy and cantankerous. He rarely complies with requests, even from the Headmasters, knowing his job remains secure at the organization. He actively hinders the party's efforts to solve the riddles and learn about Rico, holding a grudge against them for River raising her voice against him at their first meeting.

Appearance
Blue has a frail physique, dark skin, and grey hair. His eyes are dark blue. He is apparently human, but he may be of Dryadic heritage, or have had a child with one, as he is Alejandra's grandfather.

True to his name, he wears dark blue robes: this is more likely connected to his name than his tier, however, as it would be unusual for a Body fighter to oversee a Mind- or possibly Heart-associated department.