Shera was someone who had known Garvit since he was 4 to 5 months old—he was just learning everything at that time.
At first, it thought of Garvit as a father figure; it didn't mind being ordered by the guy, but as it grew, it realized something.
Garvit's orders, whatever the guy asked the tiger to do, were all out of laziness or just because he wanted someone to order around.
Unlike what it always thought, Garvit didn't really need help; he was just lazy, so, slowly, their relationship changed into that of friends, but their relationship was never bad.
The dynamic changed, but they still cared for each other, so no matter what kind of attitude Shera shows to Garvit or no matter what Garvit says to Shera, at the end of the day, they would be found sleeping close to each other, with their bodies resting on each other.