How is Kezia different from her sisters? Explain

In “The Doll’s House,” Kezia Burnell is the youngest of the Burnell girls. Aware of the luxury of the doll house they receive, she finds it enchanting. She is particularly fascinated by a miniature lamp.
Kezia is shown as less selfish than her older sisters, Isabel and Lottie, who boast of the gift. After all the other schoolmates have been invited to see the house—except for the poor Kelvey girls—it is Kezia who takes the initiative to speak with the Kelveys, who are always excluded from their social circle, and to ask her mother if they can come to see the doll house. Her mother tells her absolutely not.
Kezia not only perseveres but goes against her mother’s orders. When she does bring them home, her aunt rudely shoos them away. The younger Kelvey girl, however, has caught Kezia’s fascination with the lamp.