Iris was also one of the messengers of the gods in Greek mythology (mostly between men and the gods, hence the reason she's associated with the rainbow) She was said to have wings and could move very fast.
Actually, what might help more is narrowing down what you're looking for in an avatar. Judging from what you wrote, you seem to like technology (the gun), but also some mental abilities (the TK). To be honest, I'd go with one or the other, not both. Powerful enough TK can render the gun redundant real fast.
The name you gave, "Oracle Ranger" is a bit of a mouthful. Now, "oracle" implies some kind of precog or clairvoyance (mental abilities again). "Ranger" is a little trickier since it could go with the more classic ranger (using classic weapons like bows, swords, etc) or the modern military ranger (again, firearms, possibly a stealth suit, etc)
What do you want this character to do? Is this a team player or a lone wolf? Are you a good guy or a bad guy or something in between? Whatever you can come up with that might help, just shout it out.