Well, the least amount of appearances of her was in Season 2. It's most likely because fans also wanted other stories regarding the clones and other Jedi
No, Ahsoka doesn't have any sentimental relationships in Star Wars: The Clone Wars
Ahsoka
No. But, they have a strong realationship!
Dave Filoni; the director on Star Wars the Clone Wars
No
Ahsoka Tano served as Skywalker's Padawan during the Clone Wars.
The name of his apprentice is Ahsoka Tano
If you mean Ahsoka Tano, then she is the Padawan apprentice to Anakin Skywalker in Star Wars: The Clone Wars animated movie and following animated series.
Ahsoka Tano returns in season six, but only for a moment as a vision from Yoda.
That episode is Season 3 Episode 16 "Altar of Mortis." (And actually, the only reason why Ahsoka turned evil was due to the living embodiment of the dark side of the Force corrupting her with a spell in an attempt to get Anakin to join the dark side)
Ahsoka Tano is 14 years old at the start of "Star Wars: The Clone Wars" and around 17 years old by the end of the series.
Rex's fate is a mystery to be revealed. As is Ahsoka Tano.