Is the scream "gya" masculine and "kya" feminine? I don't speak Japanese, but I notice in some manga (like Mr. Fullswing for example), male characters tend to scream "gya" or "guwa" while female characters tend to scream "kya". Is it true that "gya" sounds masculine and "kya" sounds feminine? If it is, what makes "gya" masculine and "kya" feminine? Is it common practice to use these interjections as such? If a female character uses "gya", does she tend to be describe as boyish (using "ore", "boku" and whatnot)?

Yes, represents screams of higher tone, and is clearly feminine or childlike. is usually . Gay characters often say in manga, too.

, on the other hand, is not necessarily masculine. When female characters use , it's usually bolder, more urgent, or stronger than (for example, a dying scream).

In general, voiced consonants tend to be used more often to represent larger, rougher and/or lower-pitched sounds. is the sound of vulgar laughter of middle-aged men, whereas sounds young/cute/feminine. The same is generally true for onomatopoeia pairs like , , .