The symbol appears most frequently throughout the series. In episode 12 ("Godsend") the symbol, as appears on the sword hilt, is revealed by Ando Masahashi to be a combination of two Japanese characters: 才 (sai) meaning "great talent" and 与 (yo) meaning "Godsend". Appearances include
As a decorative object in the Bennets' home.
In a swimming pool at the scene of one of Sylar's murders. Several flotation devices form the shape. (ep. 102, when Matt is next to the swimming pool, before being questioned by the FBI women)
On a billboard behind Hiro when he teleports at Times Square.
On a drawing done by Peter Petrelli.
On various paintings by Isaac Mendez.
On a post-it note on the map in Mohinder Suresh's apartment.
A pattern in the algorithm of a program in Chandra Suresh's laptop computer.
Written on a geometry textbook owned by Claire Bennet.
Written on pictures in Sylar's apartment.
On Jessica's back whenever she surfaces as Niki's alternate personality. When Jessica is repressed, the symbol does not appear on Niki's back.
On the hilt of a katana once owned by 16th-century samurai Takezo Kensei, possibly the earliest known manifestation of the symbol. This katana is held by future Hiro and sought by present Hiro. The symbol also appears on the replica of the sword, which was stolen from the museum by Hiro.
Printed on the front of Chandra Suresh's book, Activating Evolution.
Printed on the upper-left corner of the 14th issue of 9th Wonders! comic book, written by Isaac Mendez.
On a necklace worn by the Haitian.
On a picture of Niki as "Jessica", painted by Isaac. The symbol was hidden under an extra layer of paint. (Later on, Jessica hides the symbol under a layer of foundation.)
Drawn on a Greyhound bus sign, seen right before D.L. spots the runaway Micah in the episode "Homecoming".
The branch in the tank of Chandra's lizard.
Formed by shards of broken glass on the hallway floor when Sylar attacks Mrs. Bennet.
Seen in the form of an ice sculpture as a dolphin in the kitchen of a Las Vegas casino.
On the poker chips from Linderman's casino.
On the "About Us" page at Primatech Paper Company's website as part of the Heroes 360 experience.
On the sign behind Hiro and Ando when Hiro tells Ando to go home in Unexpected
In the sand where Nikki buries the bodies of the men that she (Jessica) killed