I read your query carefully and I am sorry about what has happened to your sister.
Unfortunately there is not a specific treatment for that sort of hemorrhage. Medical management consists in controlling her blood pressure if high and drugs like neurotol in the first few weeks to control the
brain swelling. Hemorrhage in that area often doesn't benefit much from surgery either.
That does not mean that your sister's condition will not improve. She seems to be past the most acute stage by now. With the gradual absorption of the blood improvement is expected, but it doesn't depend as much on drugs but on
physical therapy in order to stimulate the unimpaired brain areas to compensate for the damaged ones. It will be a slow gradual process, most improvement is expected in the first 6 months. To what percentage she will recover depends of course also on the size of the hemorrhage and the irreparably damaged structures. She is young so with regular
physiotherapy she has good chances.
Of course the cause of the hemorrhage must be determined. Often in that region the cause is
high blood pressure, but at her young age it is especially important to have brain imaging exclude malformations in order for the hemorrhage not to recur in the future. If the cause is high blood pressure she must be regularly treated from now on to prevent recurrences.
I hope things work out for the best.