Shozan Ando is an elderly philosopher and scholar possessing expertise in the English language. He offers shelter to the injured protagonist, Jiro, during his journey. Applying his linguistic skills, Ando deciphers cryptic notes left by Jiro's father, Tarouza. These deciphered notes contain clues to Captain Kidd's treasure, directly leading Ando to instruct Jiro to travel to America and continue the quest.

This character is a fictionalized version of the real historical figure Andō Shōzan (also Andou Shouzan) from the Bakumatsu period. Like his historical counterpart, this Ando Shozan was banished to Ezo (modern-day Hokkaido). His exile resulted from activities in Nagasaki, where he studied foreign languages and engaged in unspecified actions deemed suspicious by authorities. His philosophical lineage traces back to his grandfather, Andō Shōeki, a mid-Edo Period ideologist and doctor. Shōeki criticized unproductive ruling classes and rejected major contemporary belief systems, including Shinto, Confucianism, and Buddhism.

During Jiro's stay, Ando resides with an Ainu caretaker named Chiomapp. His assistance to Jiro makes him a target for Tenkai's forces. Three assassins, known as the Matsumae Three or Three Demonic Ninjas, attack Ando and Jiro. Ando is killed during this confrontation, fulfilling Tenkai's objective to eliminate Jiro's allies. Following Ando's death, Chiomapp takes her own life when confronted by Tenkai, refusing to reveal Jiro's whereabouts.