I tried looking up aromantic and it doesn't seem like a perfectly descriptive term... Like it seems to describe people not having the emotional desperation (i.e. passion) found in crushes, but a lot of romantic love doesn't have that either... The problem seems to be with the term romance itself, "romantic" love is usually composed of like 1 to 3 different types of love out of like 4 or so distinct types of romantic love, it often doesn't contain any emotional desperation (if the couple is safely established for instance). So it ends up that aromantic people can be romantically in love? Maybe there just isn't a better term or maybe I'm wrong about what being aromantic is? idk.
Aromanticism and the asexual spectrum is a complex topic because it's, well, a spectrum. Some people have no romantic or sexual attraction to others whatsoever, but some of us are also capable of feeling romantic attraction. Some are completely repulsed by the idea of engaging in sexual contact, others are willing to perform it if an alosexual partner wishes to, others might still be capable of wanting to engage in such activities but only if a very deep bond is form (demisexual and gray ace). You're right in pointing out that attraction has several parts, such as sexual, romantic, and aesthetic, but generally asexual or aromantic people simply are not capable of feeling such forms of attraction.
If this does end up going the mutual romance route, I'd flag Yuriko as most likely demi myself.