Kaleidoskop was originally created by myself for Heroes Alliance #3 (available as issue 2 in print). Her mentor, the old Kaleidoskop, first appears on the second page of this issue, released in November 2010. Kaleidoskop herself first appears on page 12, released in December 2010. She hasn't appeared on HA since…

Her HUniverse wiki page can be found here.

Here are my original descriptions (from 2010) for both the old and young Kaleidoskop:

Kaleidoskop (sr.):
One of the first German superheroes to appear after WWII, he is a
regular, if well trained, human being called Karl Leitner. The gadgets
in his kevlar-padded suit give him power over light (there are light
collectors on his forehead and chest): He can shoot beams out of the
projectors on his forearms, and he can manipulate the intensity of the
rays. The collectors, projectors and the rays themselves resemble
kaleidoscopes.

Kaleidoskop (jr.) has recently
become the first Kaleidoskop's sidekick. (To avoid confusion, they will
refer to each other as senior and junior, or No. 1 and No. 2.)
She is a 21-year old social worker whose parents immigrated from Turkey
to Germany. She can also manipulate light, but doesn't need any gadgets
to do it. She also has other common superhuman powers, like flight,
invulnerabilty and super-strength, but each of these aren't too well
developed yet. For her design, I used the colors of the German flag:
black/red/gold.

I should add that Kaleidoskop also appeared in a gag strip Hero drew later, which ties into HA#3.