This artist has other work with these two on their twitter, and based on that work plus their general work, I think the Yuri tag is appropriate here. The general tone and blushing between these two feels very intentionally made to give off a feeling of romantic tension between them.

Edit: This is my reasoning for adding the Yuri tag notably.

I thought Silence is supposed to be the mom and Saria was the dad?

cd_young said:

I thought Silence is supposed to be the mom and Saria was the dad?

Yeah I think that's the general ship idea, in terms of the family dynamic. While Ifrit is their child so to speak.