Don't leave me...

Overall, this is a very cute picture. Just thought I'd say that before I begin the actual critique.

First off, Chibitalia's hand seems a bit... odd? The fingers are disproportionate, even for a chibi. If you need a reference for drawing hands, there are many here, local on DeviantART for your free use. Second, the way that the tears flow is a bit awkward on their faces. From the side view, the tears would run down the faces going from the eye, closer to the nose because they're on the cheek, and then down about where you put them on your drawing. Third, HRE's white cloth... thing in the front, lacks proper cloth depth and shadows. Look up a reference if you need to next time.

As for the colors, you did well on the shading for the most part. The skin tone on both of them is slightly off, but it's not all that noticeable.
That's all I have to say <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" title=" (Smile)"/> Keep on drawing! I hope that none of this came across as rude or disrespectful. I hope that you follow art as a passion or career.