Takeru Tenkūji (天空寺 タケル Tenkūji Takeru) is an 18-year-old man who is the current heir to Daitenkū-ji. Ten years earlier, his father left him home as he went on a ghost hunting expedition. Before his father apparently died, he sent Takeru a gift of the tsuba from Miyamoto Musashi's katana which he wears on a necklace. As well as his interest in Miyamoto Musashi, Takeru enjoys reading from a book titled Stories of the World's Greatest People (世界偉人伝 Sekai Ijinden) and learning about the history and legends of famous historical figures. Wishing to follow in his father's footsteps as a ghost hunter, Takeru laments being unable to see ghosts, which neither Akari nor Onari believe exist, until he receives an item called an Eyecon (眼魂（アイコン） Aikon)[b] on his 18th birthday, a gift meant for him shou