Jaiko Goda is the younger sister of Takeshi "Gian" Goda, debuting in the original manga's first chapter. She shares her brother's short, chubby build and short black hair. Her attire varies by adaptation: the 1979 anime features her in a red overall skirt, white top, and beret, while the 2005 anime gives her a green top with a flower design and a manga artist's hat. Her surname, Gouda, incorporates Japanese characters meaning "sturdy, strength, robust, tough" and "field, rice paddy." Some English versions call her "Little G," matching Gian's "Big G." Initially portrayed as snobby and prone to mean pranks on Nobita Nobi, Jaiko's character evolved significantly in later series appearances. She became consistently kind and considerate in the 2005 anime, forming a distinct contrast to Gian's aggression. Her early negative traits were later reassigned to a separate character, Botako. Jaiko excels in domestic skills like cooking and sewing. Pursuing a career as a manga artist under the pen name Christine Goda (クリスチーネ 剛田), Jaiko submits work to contests but faces frequent rejections due to underdeveloped storytelling. Discouraged, she often receives encouragement from Nobita, pressured by Gian. She held a crush on a boy named Motesugi and later developed feelings for Moteo, a seventh-grade student. She is also occasionally nicknamed "Hana." Future projections show her achieving success as a famous manga author with widely sold comics. Within her family, Jaiko enjoys a positive relationship with Gian, marked by a stronger bond than his harsh interactions with friends. Their mother treats her comparatively better, sparing her Gian's frequent chores; both siblings sometimes collaborate on special meals for him. Her interactions with her father are minimal but presumed amicable. Gian exhibits significant protectiveness towards her, sometimes annoyingly, particularly concerning her manga career where he occasionally interferes using Doraemon's gadgets. In "Stand By Me Doraemon," Jaiko plays a consequential role within an alternate future timeline. Without intervention, Nobita marries her, leading to business failure, destruction by fire, crippling generational debt, and hardship for his descendant Sewashi. This bleak outcome motivates Sewashi to send Doraemon back in time, ensuring Nobita marries Shizuka Minamoto instead and avoids the misfortunes linked to Jaiko.