The shapes of the letters are not arbitrary, but reflect the names for the letters, which are words, usually the names of objects or actions representing conventionalized form in the pictorial shape of the characters.The Ol Chiki script was created in 1925 by Raghunath Murmu for the Santali language, and publicized first in 1939 at a Mayurbhanj State exhibition.

[2] Unlike most Indic scripts, Ol Chiki is not an abugida, but is a true alphabet: giving the vowels equal representation with the consonants.

For example, when missionary and linguist Paul Olaf Bodding, a Norwegian, studied the Santali language and needed to decide how to transcribe it (in producing his widely followed and widely respected reference books such as A Santal Dictionary), he decided to transcribe Santhali in the Roman alphabet: despite his observation that Roman script lacks many of the advantages of the Indic scripts, he concluded that the Indic scripts could not adequately serve the Santali language because the Indic scripts lack a way to indicate important features of Santali pronunciation (such as glottalization, combined glottalization and nasalization, and check stops) which can be more easily represented in the Roman alphabet through the use of diacritics.

Differences include the diacritic ahad, which in print style is used with ᱜ, ᱡ, ᱦ, ᱫ, and ᱵ, all of which can form ligatures with ᱽ in cursive.

[12] Since 2017, Santali graphic designer, typographer, and film producer Sudip Iglesias Murmu has been working on design principles to provide a lowercase alphabet form for Ol Chiki, which would permit Ol Chiki writing and keyboarding to use a two-case, or bicameral, format (Using both uppercase and lowercase), as is done in many other written languages, including the Roman-alphabet languages such as English (all of which were once unicameral scripts, but evolved into a bicameral stage over time).

As the development of a lowercase form is contributed to developing a standardized cursive form (in those writing systems which use one), the evolution of lowercase is likely to allow standardizing cursive to the point of making it type able alongside more rigid "block" printed letterforms forms So far, only Ol Chiki (Chapa) letters are used in keyboarding, typesetting, and publishing (in effect, producing capitals-only text for the entirety of all printed or keyboarded documents).

In hopes to remedy this situation and to harmonize the two scripts, Sudip Iglesias Murmu has innovated by creating a series of lowercase letters, which he has integrated with the already existing font of Ol Chiki.