Taksaka is messed up. I mean, his personality attached to his name was screwed up in the beginning of the Universe, and Shiva, the fixer of such mistakes, couldn't fix it/didn't get to him in time. This causes him to have rages quite unlike any other in his clan (except for Vritra himself), along with being less attached to things than other dragons. Kasak inherited this "messed up" trait from his father, and it causes him to be cruel/mean/unkind/whatever. The earrings Visnu gave them change their personality, more like what it would be if Taksaka and Kasak's personalities weren't messed up and without the deadening of personality (I think this somehow got passed down to their half children, too).
For Taksaka, he helped Utpala commit suicide (basically) and didn't give a damn; when he put on the earrings, he wept like a child. Same thing happened to Kasak during the Cataclysm when he killed his wife Meiwen and tried killing his daughter Agwen: without the earrings he couldn't feel anything, with them in he cried and felt terrible. Agwen felt betrayed and she now distrusts her father when he's not wearing his earrings, partly because she's more "human" in the feelings sense. Anyway, I think this extreme is isolated to those two, though, since Currygom said that most dragon halfs turned out fine and/or weren't "particularly evil."
Utpala, even with his/her feelings deadened, still felt too much pain. She lost Taksaka and no matter what she did she couldn't get him back, and she most likely lost other friends due to this as well. She became attached to humans, and decided to protect her child's village (she had a half child). However, she was unable to protect it from Vritra and only Ian Rajof survived. She ended up giving up her life in order to protect both her last decendent (Ian) and her original love (Taksaka) so that the repercussions of Vritra's act wouldn't become known. She even controlled her transcendental that hit Mistyshore so that it would cause very little damage... Sorry if I confused you, when I think of Utpala I think of her beautiful blue female form more than her black and red male form.
Poor Vritra has had insomnia. This is habitual sleeplessness aka lack of sleep aka you can't sleep at all when you want and need to, and it's been known to drive people just about insane and/or batshit insane. It may make him less stable than usual for a Nastika King (This is why he attacked the Three Beauties - Shuri, Menaka, and Airavata - when they came to ask him who was prettiest. He'd had a bad bought of insomnia right then, if I remember right.). Vritra's also known to be a bit clumsy (i.e. him dropping his speech in the finite). Perhaps him attacking Ian Rajof's village (so said by Utpala) may be due to the fact that Vritra Nastika become reclusive and unwilling to fight once their mate dies and this would make him lose his chances to fight/spar with Taksaka. His indifference is not known at this time, but he likes to be belligerent towards Taksaka (as evidenced above). We also don't know if he still has insomnia, if it comes or goes, or if it was a one-time deal.
Another thing to remember: Even before Visnu asked Brahma to nearly wipe out their emotions, the Vritra clan was the clan that felt the least emotions out of all the Sura clans. This made it easier for Brahma to wipe out their emotions and blah blah blah. There's also very few Vritra Nastika left in the Universe since near the beginning of the Universe there were only about twenty or so left from who knows how many. At least one dragon has died since then (Utpala) and I wouldn't be surprised if we found out a couple others have died as well.
I got all my info from the webtoon and the finite, with a couple things from translated blog posts. Once school is out tomorrow (Hell yeah! ) I can find time to link specific sources if you want. If I missed anything just add it in or whatever, I've still homework and studying to do for tomorrow (it's a half day but I still have homework due and tests ).
Edit #2: Okay, after looking up some things and seeing some of Mizura's corrections, I changed some of what's in here. Thanks to school I'm having insomnia myself but tomorrow's the last day. Hopefully I can be more accurate with my posts again after that. ^^
Edited by Kaiein, 30 May 2013 - 06:01 AM.