The Mro block spans U+16A40–U+16A6F, 48 codepoints in Plane 1 (Supplementary Multilingual Plane). 43 are assigned in Unicode 16.0; the other 5 are reserved for future characters.
All of its characters belong to the Mro script.
By general category: 31 other letters (Lo), 10 decimal digits (Nd), 2 other punctuation (Po).
The first 43 arrived in Unicode 7.0 (2014).
Because it lies outside the BMP, every character here takes four bytes in UTF-8 and a surrogate pair in UTF-16.