Itsuki Koizumi

Itsuki Koizumi from "Suzumiya Haruhi" is the last member to join the SOS Brigade, recruited by Haruhi as a "mysterious transfer student." Always smiling, he speaks in a formal and polite manner, often giving long explanations with exaggerated hand gestures. Itsuki harbors a secret: his outward personality is an artificial image he maintains to keep Haruhi's mentality balanced. His relationship with Kyon is strained, as Kyon often finds himself annoyed by Itsuki's plastic smile and his compliance with Haruhi's outrageous schemes.