I should also think about the character development arcs. Rani starts off maybe impatient or overwhelmed, grows into someone compassionate and strong. Shanker might start off as a character with a mysterious past that is revealed, adding depth.
Research: I should consider how cultural norms in Indian society affect interactions with elders and people with disabilities. Also, how families traditionally support their elders.
Themes: True vision is seeing beyond the physical, empathy, intergenerational relationships, overcoming obstacles through adaptability.
Potential scenes: Rani drops her things and has difficulty, Shanker senses her distress. A moment where Shanker uses smell or touch to recognize people. A crisis where Shanker gets lost outside and Rani has to find him, deepening their bond. The climax could be Rani standing up for Shanker against family members who are frustrated with his condition, or Shanker showing wisdom despite his blindness.