based on challenge with topic “design OC with name Signal Sender”. I invented the OC deceived by the royal sisters and from who they hide that she is the real ruler of Equestria. To prevent her from the discovery and keep busy they lie to her that her name is Signal Sender and her destiny is the button pressing.
 
The picture on the wall is from >>142845 by artist:equestria-election
 
There was 3 versions uploaded to derpi, merged as duplicates by my request. The first one has too primitive door drawing, the second one has grammar mistake in the text (say/says).