I'm not sure who the yellow one is, but the pink one is Firefly from G1 My Little Pony, which aired in the 80's.
And the light blue variant is G3 Rainbow Dash, who had a vastly feminine personality.
Destiny sucks major cock, it is **** wayyyy back before the DLC I forgot the name was launched and said to be "ruining everything". Yes, FO4 sucks, but only for now. If GECK comes out the whole problem thingy would be fixed because mod is love, mod is life.