Trivia about the Ability Tree System

This page introduces various information that are good to know about the Ability Tree system and might be helpful in case you want to try to use this system efficiently.

Quests that drop Principle Fruits
Both regular Principle Fruits as well as Special Principle Fruits only drop on specific Quests of chapters from Arc 2. In general, the fruits drop at boss quests. Each Quest drops 3 types of Fruits: One regular fruit, one special fruit for elemental resistance and one special fruit for increased chance of applying abnormal status effects. The following table lists all Quests that drop Principle Fruits, as well as some further information (like which fruits are dropped):

Fun fact: The element whose resistance gets increased is the same as the element of the boss you face. There is no such consistency for the regular fruit or the second special fruit.

Drop rates and efficient grinding of Principle Fruits
Now that you got the list of all Quests, you might wonder what's the best Quest to get Principle Fruits. To explain this, it's needed to explain the drop rates of the drop rates of Principle Fruits.

As a general rule, the drop rate scales proportionally to the amount of stamina you need to pay to enter the quest. For regular fruits, 1 stamina is equal to a drop rate of 20% (or 5 stamina is equal to 1 regular fruit). For example, Quest 27 from Chapter 1 costs 9 stamina, thus the drop rate for the regular fruit (which is a Fruit of Life for this particular Quest) is 180%. This means that you are guaranteed to get one Fruit of Life, and in 4 out of 5 Quests, you get a second fruit as well.

This is similar for Special Principle Fruits; here, 1 stamina is equal to a drop rate approximately 0.56%. If there are 2 different types of special fruits, this probability splits equally between the two fruits. For example, Quest 31 from Chapter 1 costs 10 stamina, thus a special fruit drops with a drop rate of 5.6%, but as there are two types of special fruits, each one only drops with a drop rate of 2.8%. If there are three types of fruits (like in Quest 30 of Chapter 3), the probability is not split equally among all 3, but still, the total probability remains the same.

By these explanations, you will notice that regardless of what Quest you choose, the chances to get Principle Fruits remains the same, as the total amount of stamina needed will remain the same, at least in terms of probability.

One last question remains: What about Trial Quests?

Trial Quests cost 40 stamina, which is equal to 8 regular fruits. And indeed, you get 8 regular fruits, namingly: 2 Fruits of Life, 1 Fruit of Power, 1 Fruit of Magic, 2 Fruits of Defense and 2 Fruits of Magical Defense (these numbers are fixed). So you could get the impression that doing the Trial Quest might be a good idea. But this thinking is wrong for two reasons:
 * There are no special fruits on the Trial Quest. Since you are grinding Principle Fruits, you might as well try to get these while you are at it. Well, if you don't care for special fruits, then this doesn't make much of difference. Trial Quests would actually be the better choice, as beating this one Quest is faster than beating other Quests that cost a total amount of 40 stamina. So in terms of time efficiency, Trial Quests are recommendable.
 * As stated above, you get a fixed number of all 5 regular fruits. But in most cases, you don't want to grind all 5 types of regular fruits at the same time, but only one. As you get 1 fruit for every 5 stamina you pay, you could spend 40 stamina to get 8 fruits of the type you want instead of getting 8 fruits of different types. Thus, the Trial Quest is not recommended unless you don't care about the type of fruits you get.