This is a chain of quests on the planet "Ert". You can go there at any time.
- Talk to the scarecrow
- Find Persephone (little yellow bird, hanging out with a cactus) and talk to her
- Talk to the cactus
- Search the bushes near the sad egg (lift+drop with the square button) for a present with a rabbit in it
- Go back to the cactus and summon the rabbit
- Talk to the scarecrow again
- Talk to the sad egg to get some balloons
- Summon the balloons for Persephone
- Go to the scarecrow and wait for Persephone to follow
- The trophy unlocks after they talk to each other
NOTE: this game shares save files between different platforms but NOT trophies. If you do this quest on the PS3/Vita and then load your save on PS4 (or vice versa), it WON'T unlock the trophy for you. You will have to start a new game for it.