I have a hypothetical question open to debate: Is there any reason for an immortal creature to die heroically?
I'm not going to go run Dipani off a cliff or anything, but once we get into combat, why should she risk her neck for you guys? She has no need to be immortalized in combat. As Woody Allen said, "I don't want to live on in my fellow man, I want to live on in my apartment." She shouldn't risk death just to be immortalized in combat.
Another common choice is to die protecting something or someone. But especially as a Shardmind, emotions are... erratic at best. Love is straight out. At best, you get a momentary feeling of attachment and consider sacrificing yourself for the other. However, given that you'll outlive them naturally, why bother? I mean, Dipani shouldn't save you just to preserve a life that will naturally extinguish within a few short decades.
The final reason I can think of to die heroically is to defeat some kind of great evil. Lots of heroes do epic battle which costs both them and their adversary their life. It's a good way to die. However, there are few evils that cannot be defeated by hiding for a few centuries. If Dipani can simply hide in a cave somewhere (even in a cave in, she could simply go dormant for 3 thousand years) and wait for someone else to save the day.
Anyways, I thought of this conundrum yesterday and thought I'd see what you guys could come up with. I'm not going to intentionally screw you over in combat, but if it hits the fan, I can't think of a reason for Dipani to stay. I'd like to play her chivalrously, but I need help to rationalize it. What can you recommend?