Big-Lipped Alligator Moment: Pixy Misa's Villain Song in episode three of Magical Project S. It comes out of nowhere and has zero relevance to the plot of the episode. It's completely forgotten about immediately after.
Questionable Casting: Sue Turner-Cray as Misao in Episode 1 of the dub. She practically whispered her entire performance in a failed attempt to sound like a child, and clearly had great difficulty hiding her British accent. Her French accent as Pixie Misa is also questionable. When Debi Derryberry took over for the second episode, nobody complained.
Squick: The OVA features the very questionable visual of Sasami (explicitly stated to be 10 years old) being completely naked during her transformation sequences.
Tear Jerker: Tenchi's one appearance in the TV series ends with him not only having to leave, but turning out to have a girlfriend. In the face of both of these revelations, all Sasami can do is break down crying in Misao's arms.