Easter eggs
Easter eggs are special eggs that are often given to celebrate Easter during springtime.
Easter eggs are common during Eastertide as they symbolize the empty tomb of Jesus.
※Effects is special egg → Easter eggs are special eggs → Easter is in the spring → Osmunda japonica is a young frond during the spring (Batsu)
Easter Bunny
卯 (Year of the Hare) and 卵 (egg) look similar.
The Easter bunny is associated with eggs.
Mt.Kiki somehow connected this to the Floyag by saying eggs come from the uterus.
Easter Eggs in Media
NASU has a cheat code easter egg based on the famous Konami code.
Fabergé Egg
A Fabergé egg is a jeweled egg. Most were miniature eggs that were popular gifts at Easter.
A section here claimed Fabergé eggs purchasable in a now-defunct website resembled some of the effect eggs.
Below there is given a chronology of the eggs made for the imperial family, though there has been dispute about the dates of some eggs.
An alternative chronology dates the Blue Serpent Clock Egg as made in 1895, and states that the Twelve Monograms egg is in fact the supposedly lost Alexander III Portraits egg, made in 1896. Thus, according to this chronology, the 1887 "Gold egg with clock" would be in fact lost.
Ascension Day
Ascension Day is traditionally celebrated on a Thursday, the fortieth day of Easter. It involves the Feast of the Ascension, celebrating the ascension of Jesus into heaven. This can be linked to the Ending of the game. (Madotsuki collects eggs — Easter — then dies — associated with heaven)
※2 The Witch effect may be related to Christian witch-hunts.
※3 Hopi mythology: The ending is flying "West" with sink into the sun(Hopi's Sun) in real world ⇒ Madotsuki has trashed effects in the Nexus, so the ending is not "East" (Easter) ⇒ But with effects you can fly (in the Witch's Flight event) to the east, which is related to Easter and the sun → Easter being related to the ascension of Jesus
※Flew to the East(Easter) of the Mall Rooftop, dropped down and go back to Madotsuki's bed ⇒ Madotsuki "resurrects"