This started out as a guide for these guys' spot patterns, then turned into...something else.

I suppose this could be considered a representation of their bond as siblings. The way their hands and tails are touching suggests a sense of togetherness, an unshakable feeling of camaraderie, while the way their ears are held heihlighs their differences.
Senshi's gaze into the distance could be interpreted of an expression of his desire to move ahead in life, while Himiatsu is staring at him and sticking out her tongue. Mocking him, maybe? However, her hand is resting on her heart. An indication of her heartfelt feelings? Both a prayer for him to go on and a show of her own nervousness at this thought? Senshi's hand is on the right side of his chest, indicating flakiness or unwillinness to commit? Situs inversus? Angina?

Or maybe I just wanted to draw them naked. Fuck, I dunno.