Tbf, it's not like Rona's as malicious as her father/brother , but it is good timing since i don't think she necessarily planned the timing (unless she wanted to specifically prevent Elmina's death versus just going back for the berry/fruit pies XD) because Rona's just adventuring where she wants as opposed to following the exact guide on where to go 'next' after the Wednesday town
Unless ur talking about Elmina since ppl misunderstood her "betraying that family" as being heroic or so/expecting her to be a savior (although even then feels like the others should evacuate versus just watching the battle unfold)