This is one of the Achievements that add points to your rank. Caretaker requires you to raise aniphon's Affection level.
Requirements
Bronze
Improve an aniphon's affection to level 1. Award 1 point.
Silver
Improve an aniphon's affection to level 2. Award 4 points.
Gold
Improve and aniphon's affection to level 3. Award 9 points.
Platinum
Get 10 aniphon to at least level 2 affection at the same time. Award 16 points.
Diamond
Get 10 aniphon to level 3 affection at the same time. award 25 points.