@poni-pon​ allowed me to make a similar ‘ponification’ as her Betty Bye… 
This is Whitney End, or “Wits End”. She is a pony who is constantly stressed, anxious, nervous and drained. Too tired to use her magic to complete tasks, she calls it a ‘good day’ when she can brush her mane or get out of bed. To the regular pony, things that make Wits End anxious are ‘petty’ and minor in nature, but a full blown assault to Wits. 
Wits wants nothing more than a good nights sleep, a day without anxiety and supportive, caring ponies surrounding her.