He always tries to join in the games but somehow always gets left out.
Opah is the grandmother Upin, Ipin and Ros.Like Ipin, Ros saying "True true true" in Scrimp and save. She loves to tease her brothers when the opportunity arises. She has a reputation of being fierce but actually she is a loving and gentle sister. Ros (aka Kak Ros or Akah for international model) is Upin and Ipin's teenage sister.Ipin is obsessed with fried chicken and has a habit of agreeing with statements by saying "betul betul betul/yes yes yes" as previously known as "true true true". Although seemingly quieter, he is actually smarter than Upin. Ipin is the younger brother of Upin and is the more cheerful one.You can tell him apart from his twin brother by the twirl of hair on his head. He is the more outspoken one and usually, he is the mastermind behind the cheeky antics the twins do, which often lead them into a lot of trouble. Upin is the elder twin brother of Ipin by only 5 minutes.
A new character was later added in the series who is an Indonesian girl named Susanti who moved in with her family. Among the village's other notable residents are Muthu, owner of the village's only food stall who lives with his animal whisperer son Rajoo and pet steer Sapy Salleh (Sally), a transgender-apparent who owns a mobile library and Ah Tong, a strident-voiced vegetable farmer. Tok Dalang keeps a cluster of rambutan trees for commercial purposes, and a rooster named "Rembo". The headman of Kampung Durian Runtuh is Isnin bin Khamis, better known as Tok Dalang Ranggi, the Wayang Kulit champion. Upin and Ipin study in the village's Tadika Mesra (kindergarten), where they with a group of classmates, including the adorable and right-thinking Mei Mei, a joker and poetic Jarjit Singh, the clumsy and short-tempered Ehsan, an easygoing and sarcastic Fizi (Ehsan's cousin), and an entrepreneurial and meticulous Mail. They have lost their parents in their infancy. Upin and Ipin are five-year-old Malay twins who and their elder sister Ros and grandmother Uda (whom they call Opah) in a village house in Kampung Durian Runtuh.
Originally a side project for the blockbuster animated film Geng: The Adventure Begins, Upin & Ipin was introduced on TV9 on 13 September 2007 as a six-episode Ramadan/Eid special, to teach children the significance of the Islamic holy month. Upin & Ipin is a 2007 Malaysian television series of animated shorts produced by Les' Copaque Production, which features the life and adventures of the eponymous twin brothers in a fictional Malaysian kampung.