Heartwarming: Ben 10

  • The episode "Ken 10" was made of this, but especially when Ben stops Devlin from leaving and instead of throwing him in the Null Void like he expects, asks him to stay and become a part of the family, and Devlin, of course, accepts.
  • How did anyone forget "Secrets of the Omnitrix"? Ben breaking down into tears, and then embracing his cousin Gwen, after thinking she was dead. If you've watched the series you'll know it takes a lot to make Ben cry.
  • How about the fact that in "Merry Christmas" Ben and Gwen actually have fun with each other for the most part. Seeing that they mostly argue, it's actually nice seeing Ben and Gwen being friends or even being like brother and sister to each other (given they are born on the same day). Heck, they even get Grandpa Max to join in on the fun.
  • Whenever Gwen stands up for Ben, or vice versa. These two may not always get along, but they do care about each other like family should and they would always have the other's back.