Each Servant has a different rate at which they gain bond levels. The only exception is Shielder (Mashu Kyrielight), whose bond level is tied to story progression.
Angra Mainyu has the same reward as a 4★ Servant.
Since the release of Lostbelt 3 - S I N, Bond now has a max level of 15, with each level from 11 to 15 giving 30 Saint Quartz each. To unlock level 11 to 15, a certain amount of and is needed for every subsequent levels. From then on, it works like the previous level, where you need to complete quests to gain such EXPs.
|Reward for reaching Bond Level:|
|Level Cap||EXP Needed to Reach this level||Cumulative EXP Needed||Needed||Needed|