Okay, first, let me explain:

I have quite the literal mind and I pretty much interpreted the prompt exactly as it was phrased. So Kurogane is supposed to be Hachiman, the Japanese god of war who is, coincidentally, also related to the element of water (pretty much like Kurogane and his kudan) and who is, also coincidentally, protector of children. The Tomoe (this Japanese symbol of commas swirling-- and leaving a very interesting negative space in their midst-- that I placed as a mon on his belt) is also especially related to Hachiman and can be seen in his temples, the same way it could be seen in the den-den-daiko Kurogane's father was holding for his son in the manga. I tried to include all these elements in the design of Kurogane's outfit, and I also added the butterfly because of Yuuko, since he's, after all, supposed to be his pawn in canon. The animal associated to Hachiman is actually the dove, but the pic was already pretty crowded and I couldn't include that without sacrifying clarity (but I swear that I did try).

Hope you like it.