Microphone generally has a kind personality, but this is usually overshadowed by her extreme loudness and her constant shouting at times. Sometimes, she can control her volume using a button, but it has also been shown to be triggered by accident. In addition, she is very outspoken and vocal about her wants and desires, as shown in A Kick In The Right Direction, and appears to be easily irritated and apoplectic (e.g. at Cheesy's jokes and at Dough). She makes a deal with Taco and is now questionable and suspicious.
Official Site Bio
Microphone is a very outgoing and friendly contestant who just wants to have a good time. Unfortunately, she seems to not be able to keep her volume under control, causing her to be rather loud around other people. This can irritate people very easily and helps and hurts her in many situations.