The four founding characters: Cony, Brown, Moon and James first appeared in two sticker packages, Brown and Cony and Moon and James as it launched in 2011. They became popular quickly due to the unique designs.
In 2013, three new characters: Boss, Jessica and Sally joined the group. then a year later, Leonard was introduced and appeared in LINE TOWN and Edward was soon introduced by a sticker package called Edward: Special Edition and the group and brand was finally formed and launched.
In 2016, As its 5th anniversary, LINE announced Brown's younger sister Choco as a new member. And her boyfriend Pangyo was introduced in LINE×Apps for Earth sticker package which was promoting "Protect the Environment".
- LINE is from Korea. but its YouTube channels expect Brown TV and animated series are from Japan due to it’s popularly.
- The non-protagonist LINE Friends characters are only appearances in its stickers or in the LINE Rangers.