Ruca definitely never expected to fall in love w granson. He stayed behind with him in the first mostly to avoid his duties as wol back on the source but when Ruca started getting bombarded by echo visions so badly it interfered w his life to the point where he ended up in constant pain-

And spent most of his time bedridden or unable to travel very far Granson dropped everything to take care of him and that’s when Ruca Realized and he was donneee for like he fell so hard lol he never tells Granson thou 🫣