The illustration features the following characters. Helios who is a wereunicorn and his first apearance in the anime is "Meeting of Fate! The Night Where a Pegasus Flies". (Awesome super power by the way, you could totally get any woman you ever wanted if you could turn into a unicorn, just saying'). Peruru or "Perle" who is a fairy. First appearance was in Sailor Moon Super S movie. And finally Chibiusa which is the civilian identity of Sailor Chibi Moon. The most well known of the trio in this illustration she is the young, short Sailor Scout with the pink hair. Her first anime appearance is "An Angel? A Devil? Mysterious Girl from the Sky".
I used my old school manga style for this illustration but back then it was my current regular style. As seen in these other illustrations.