Valentines Chocolates and Return Gifts

After seeing this and POing this nendo, I have no right not to get Karna's CE *_*

Technical the gifts are just CE's that have absolutely no effect except increasing drops in that servants class. But the do come with cut scenes of variable enjoyment.

Euryale's was dull, but the only female archer I could choose. Kiyohime's was funny, or disturbing, depending on how you view her brand of love for her master. I'm really curious to see what gorgon's cut scene is based on the tone of her other lines...

Know that grinding for these cards is not particularly valuable beyond a certain point beyond the desire to unlock the cut scenes. Stick to favorite servants first in case you decide to stop grinding so hard.

This is my second event ever so I'm also pretty hyped up. I think focusing on grinding for event shop currency is more beneficial than focusing on the Valentine CE in the long run because they don't really serve a purpose after the event other than collection purposes. The event shop has ascension materials that are otherwise hard to get, so it's a good opportunity to fill up on those.
But the Valentine CEs do look nice and are super adorable (the mini-Cu chan killed me), so if you want, just get the ones from your favourite servants rather than all of them.