The Bauhinia genus of trees is seldom used for bonsai. Main reason is that most species have large leaves that do not reduce well, meaning that medium and small size bonsai look disproportionate and out of scale. Second reason is that flowers occur on new growth for the season, meaning to see flowers on a Bauhinia bonsai you have to let branches run, grow out of shape before flowers form. While not impossible to work with, this is another difficulty in creating bonsai from Bauhinia. If you create a larger scale bonsai, more than 1 meter tall and wide, the leaf size is less of an issue. There are a few difficult to source species of Bauhinia with small leaves, but these are not common in cultivation.
When not in flower, the Bauhina do not have many traits to make them attractive as bonsai, the bark is relatively smooth, nothing distinctive. So combine boring bark, and large leaves, this is not a preferred species for bonsai. But it can make a pleasant garden tree, or patio tree, if you want to grow it in containers. So if you really want to create a Bauhinia bonsai, my suggestion would be to "go Large", at least a meter tall.
Note I use the genus name Bauhinia, rather than "mountain ebony" because at least here in North America, "Ebony" as a common name can refer to several trees in genus Diospyros, the true ebony & persimmons, or a tree in the pea family (Texas ebony, Ebenopsis). And for Texans, there is a member of the ebony family native to Texas, Diospyros texana, the Texas persimmon. So common names can be confusing. So in Texas, you can see in the same field, a pea family member, Texas ebony, and a true ebony family member, Texas persimmon. Go figure.
There are other flowering trees that will give you better proportioned bonsai, with less effort. Myself being in North America, I am not familiar with what is easily available in your area, but I would wager Natal plum, Carissa macrocarpa, Bougainvillea, a number of Grewia species including Grewia occidentalis would be available, and these all have proven track records of making acceptable bonsai. Visit a local bonsai club, see what others in your area are using.