Contraltos are the lowest female singers commonly heard. Unlike their male counterparts (the basses), however, roles for altos are a bit more common, especially in rock musicals. In more traditional pieces, altos are frequently middle-aged leading women, though some of those are mezzos as well. The only role demographic altos have a firm hold over is for women over sixty - which in most shows means grandmothers. In the rare case that there is a female villain in a show, she will probably be an alto.
Slytherin: Paper cuts and old parchment with ink stains. Love letters that were never sent. Cardboard shoe boxes of bottlecaps. Old family jewelry, coins from other countries, and coats with elbow patches. Broken shards of handmade pottery. Clippings of newspaper headlines and leaves that were pressed in place of flowers.
Ravenclaw: Sheet music and books with dog-eared pages. Silver spoons. Broken watches. Candles and old typewriters with sticky keys. Glass jars full of colorful pebbles, the silver chains of necklaces, and old train tickets. Journals brimming with empty pages. Feathers and empty inkwells.
Hufflepuff: Patterned socks and dusty buttons. Flowers pressed between book pages. Photographs stuffed in envelopes. String and the gold parts of candy wrappers. Chipped mugs, skipping stones, and family recipes. Bark from the tree in front of a childhood home. Maps and wire-rimmed eyeglasses.
Gryffindor: Old Quidditch brooms and fraying quilts. Broken wands. Shoes with holes at the toes. Brass bells and memories of laughter. Scars, empty bottles, and cozy sweaters. Unused tea bags. Mirrors that fit in the palm of a hand and seashells that sound like the ocean.