who might actually suffer from depression

• She lives alone (orphan perhaps?), is obviously very creative and perhaps even highly gifted. At the very least, she’s absolutely resourceful.
• She does have a positive view of the world, although she grew up with the same prejudices as other unicorns. But what seems to be her main motivation in this regard is that she received a happy letter back then through Sunny. Thinking about it, one can definitely come to the conclusion that Izzy would probably have developed differently through loneliness.
• She is constantly trying to help others. Of course, this may well correspond to her own personality. But sometimes I have the impression that Izzy fears nothing more than being alone. That’s why she wants to be friends with everyone. I haven’t seen enough yet to say whether that’s really due to her exuberance of energy, or if there isn’t some underlying fear.