|Manga Debut||Chapter 43|
|Anime Debut||Episode 8 (Season 2)|
Yotsuba Sugimoto (杉本 四葉, Sugimoto Yotsuba), nicknamed Yokkyun, is the main heroine of a PFP game 'One Leaf' as shown in the anime.
Yokkyun is the only recurring game character of the series that Keima Katsuragi has described as an "ideal heroine". Keima seems to have a huge affection and obsession towards her, and whenever Yokkyun is insulted or ridiculed, he either enters an extreme state of depression or bursts into anger.
Yokkyun is a short girl with waist-length light-colored hair that always has a yellow headband on her head and large eyes.
She is always seen wearing a school uniform-like outfit, consisting of a vest over a shirt, a ribbon and a skirt.
Yokkyun is shown to have pink hair and blue eyes. Her vest is colored grayish-blue, and both her hair band and ribbon are colored in yellow. Her shirt underneath is white, and her skirt is colored navy blue.
- The name Yotsuba means "four" (四) (yotsu) and "leaf" (葉) (ha/ba).
- Yotsuba's surname Sugimoto means "cedar" (杉) (sugi) and "base, root, origin" (本) (moto).
- Yokkyun seems to be drawn in a parody style of the famed Japanese visual novel, Kanon.
- Yokkyun is drawn a bit poorly compared to other shown 2-D characters.
|The World God Only Knows|
|Main Characters||Keima Katsuragi • Elucia de Lute Ima • Haqua du Lot Herminium • Tenri Ayukawa|
|Jupiter Sisters||Diana • Apollo • Vulcan • Mars • Minerva • Mercury|
|Capture targets||Ayumi Takahara • Mio Aoyama • Kanon Nakagawa • Shiori Shiomiya • Kusunoki Kasuga • Chihiro Kosaka • Jun Nagase • Tsukiyo Kujyō • Minami Ikoma • Rieko Hinaga • Sumire Uemoto • Nanaka Haibara • Yui Goidō • Hinoki Kasuga • Dokuro (Human) • Urara Shiratori|
|Minor characters||Mari Katsuragi • Keiichi Katsuragi • Miyako Terada • Izumi Ishikiri • Fujiidera • Ichirō Kodama • Morita • Hiyori Sakurai • Sora Asuka • Airi • Mobuko • Yuu Hatori • Yotsuba Sugimoto • Mai-High Delinquents • Okada • Yui's mother • Hiroyuki Ishigami • Yanagi • Shoutaro Shiratori|
|Novel characters||Tooru Amami • Asami Yoshino • Ikumi Yoshino • Shino Akuragawa • Aoba Fuse|
|Magi Kanon characters||Kozue • Bell Mark Atsume|