What Shakespearean character inspired candy being given on Valentine's Day?

The Shakespearean character that inspired candy being given on Valentine's Day is likely Queen Titania from "A Midsummer Night's Dream." In Act IV, Scene I, Titania is given a love potion by Oberon, which causes her to fall in love with Bottom, who has been transformed into a donkey. This theme of love and enchantment is often associated with Valentine's Day, where sweet treats like candy are exchanged as tokens of affection.