Meg seems to be the most "in charge" while Amy is the most confident, and Beth is the most hesitant sister. Although Meg complains about being poor at first, she speaks, soon after, in an "altered tone" about doing their part and "mak[ing] [their] little sacrifices." Later, when Jo and Amy begin to quarrel, Meg encourages them not to "peck at one another," calling them "children" and "girls," though she is only a year older than Jo.
Amy, however, seems to be the most confident. While Meg feels badly about wanting pretty things yet hating being poor and wishing she could quit working, Amy claims that she—absolutely—suffers the most of all her sisters because she has
to go to school with impertinent girls, who plague you if you don't know your lessons, and laugh at your dresses.
Then, when Jo uses slang words, Amy orders her to stop and says that she hates "rude, unladylike girls." She is certainly extremely confident in her own opinions of others and herself. Even Meg tells Amy that she has "airs" and is too "particular and prim," and the narrator calls her a "most important person, in her own opinion at least." Amy has nearly unshakable confidence and does not feel that, as the youngest of the family, she has any less right to speak and be heard.
Beth seems to be the most hesitant of the four sisters. She has a "shy manner [and] a timid voice." Though she is reserved, she is also quite peaceful. Her father has nicknamed her "Little Miss Tranquility" because she is so happy to be in her own little world, "only venturing out to meet the few whom she trusted and loved."