I didn't really think it was form of love. But i see at form of yearns or even friendship, during the old time. He cares so much for Rikiichi because he's the only one who treated him with respect and help him when no one really wants to help. He was in love with Magane and jealously kicks in whenever Magane starts to choose Rikiichi over him because it's Magane's natural nature as his Kami. Everyone in the old house (Asari especially) yearns for Rikiichi and thought of him as something they missed so much. It's basically the same devotion between Asari and Waki towards Rikiichi. But Asari loves Shoui and Waki loves Magane. No one was talking about how Asari was in love with Rikiichi right ? Because it's all loyalty.
I thought it was loyalty and friendship but the writers note threw me off
I tought she only wrote that she vaguely let readers to choose wether Magane remembers his past like Asari or not. I don't see anything that implying things
I didn't realize waki was in love with rikichi. (⊙…⊙ )