Character: arrhythmia

Arrhythmia is a generally nice pony. She is very social and thoroughly enjoys the company of others. She is also a bit mischievous and likes to play She is also quite flirtatious and will often use her looks to tease others or to trick them into doing stuff for her. Although usually calm and cool, her behavior can become somewhat erratic if worked up enough, preventing her from thinking clearly and calming others down.

Influencing people's emotions by making their heartbeats faster or slower. She is able to do this by producing special sound waves with various screeches, each with a distinct sound. Faster heartbeats work other ponies up to get them to feel more extreme emotions, like anger or determination in order to get them do something that they originally didn't have enough confidence to do. They can also create panic in others to get them to run away. Slower heartbeats calm other ponies down to get them to think clearly during pressured or dangerous situations.

Arrhythmia was born in Las Pegasus but eventually moved to Ponyville with her family when she was young. She got her cutie mark by trying to save her friend in the Everfree forest. When she was a young filly she and her earth pony friend Sunspring had sneaked into the Everfree forest despite warnings of the dangers that lurked within. While flying around in the forest they had encountered a pack of timberwolves. The two fillies quickly ran away from the wooden canines as quickly as they could but Arrhythmia almost left Sunspring behind until she realized she was trapped by the wooden canines. Arrhythmia let out a screech that ripped through the ears of the timberwolves causing them to cover their ears temporarily. In any other situation Sunspring would have stood there, still cowering in fear and unable to move. But there was something in Arrhythmia's screech that made her heart beat faster. But instead of falling into more panic she suddenly felt something rise in her. Sunspring had gotten the courage to fend off the timberwolves long enough to get free and escape the Everfree forest with Arrhythmia. When Arrhythmia asked what made her fear go away Sunspring replied that it was something in her screech that gave her courage. Arrhythmia had absolutely no idea how this had happened but the realization that she had helped her friend out of a dangerous situation had given her her cutie mark.