Your brother would have a direct speech with a sharp tone and accent which will have the potential to offend people who would be unaware of him, otherwise he would be a soft individual.

He could have friends who could take advantage of him without or with his knowledge. His eleventh house is influenced with a malefic Mars being posited in conjunction with a natural malefic and functional benefic Sun in debilitation.

The Ashtakavarga score of eleventh house is 28 means his relationships with his friends and colleagues would be at an average level and may not be quite strong, which implies he would be aware of the pitfalls and would be cautious.

Rahu is posited in the lagna and lagna lord Jupiter is placed in a trine in the ninth house and Ashtakavarga score of lagna is 20, a which suggests he could need regular counselling to keep him on the right path and would gradually achieve maturity with a little delay.

The position in the Navamsha and other divisional charts is quite good and things could be under control with some efforts.

Best Wishes.