Hiya there! Thank you so much for your kind words~
Are you referring to the little message at the end as it tallies up your choices? Unfortunately due to the more limited interactions with Ruby in this game there's no way for her to come out on top with the favourite outcome. It's mostly limited to Jilly/Tari due to them having more choices around them.
This will change in Chapter 2, though, as there's far more choices and chances to favour each character!