What did Tyson call chiron?

In Rick Riordan's "The Lightning Thief," Tyson, who is a Cyclops and the half-brother of Percy Jackson, affectionately refers to Chiron as "Mr. Brunner," which is the name he used when he was Percy's teacher at Yancy Academy. Tyson's bond with Chiron reflects the respect and admiration he holds for him as a mentor and protector. Chiron, being a centaur and a trainer of heroes, plays a significant role in guiding young demigods like Percy and Tyson.