Lv
XP per ☆
In order to raise the base level of a companion, either you gain XP through battles (slow), or you "feed" them XP stars.
Matching attributes yields a 20% increase in XP gains (example: Moritaka, 
WATER, gains more XP using WATER XP Stars than other colored XP stars).
| Star Size | XP |
|---|---|
| 1☆ (Small) | 20 |
| 2☆ (Medium) | 80 |
| 3☆ (Large) | 320 |
| 4☆ (Super) | 1280 |
XP Boosts
Occasionally, you may experience higher than usual XP gains when leveling this way. Currently, probabilities require extensive testing (which requires a lot of resources), as well as whether Failure reduces gains or nullifies it.
| Success | Probabiliy | Multiplier |
|---|---|---|
| Failure | ? | ? |
| Great | ? | 200% |
| Fever | ? | 300% |
Coin Cost
While fast and convenient, leveling this way comes at another cost: coins. As expected, the amount of coins required to gain XP has a base cost of 100 coins, and is proportional to the current level and the number of XP stars you're using.
Level Limits
Each character has a level limit dependent on their rarity (3☆ characters have the same initial limit, but different from 4☆ and 5☆ characters); however, these limits can grow by limit breaking a character. You can assume that each limit break allows for another 10 levels, and you can limit break all characters, regardless of rarity.
| ☆ Rarity | 1st Order | 2nd Order | 3rd Order | 4th Order |
|---|---|---|---|---|
| 1☆ | 20 | ? | ? | ? |
| 2☆ | 25 | ? | ? | ? |
| 3☆ | 30 | ? | ? | ? |
| 4☆ | 35 | 45 | 55 | 65? |
| 5☆ | 40 | 50 | 60? | 70? |
XP per Level
Below are charts graphing the amount of XP required to reach a level, and the deltas between levels. This XP curve is static between characters (as in, everyone has the same level of progression).
| LV | Total XP required | ΔXP |
|---|---|---|
| 1 | 12 | |
| 2 | 12 | 15 |
| 3 | 27 | 27 |
| 4 | 54 | 36 |
| 5 | 90 | 50 |
| 6 | 140 | 80 |
| 7 | 220 | 100 |
| 8 | 320 | 130 |
| 9 | 450 | 150 |
| 10 | 600 | 200 |
| 11 | 800 | 250 |
| 12 | 1050 | 350 |
| 13 | 1400 | 400 |
| 14 | 1800 | 550 |
| 15 | 2350 | 650 |
| 16 | 3000 | 700 |
| 17 | 3700 | 750 |
| 18 | 4450 | 800 |
| 19 | 5250 | 850 |
| 20 | 6100 | 900 |
| 21 | 7000 | 950 |
| 22 | 7950 | 1000 |
| 23 | 8950 | 1050 |
| 24 | 10000 | 1100 |
| 25 | 11100 | 1150 |
| 26 | 12250 | 1250 |
| 27 | 13500 | 1400 |
| 28 | 14900 | 1500 |
| 29 | 16400 | 1600 |
| 30 | 18000 | 1700 |
| 31 | 19700 | 1700 |
| 32 | 21400 | 1800 |
| 33 | 23200 | 1800 |
| 34 | 25000 | 1800 |
| 35 | 26800 | 1800 |
| 36 | 28600 | 1800 |
| 37 | 30400 | 1800 |
| 38 | 32200 | 1900 |
| 39 | 34100 | 1900 |
| 40 | 36000 | 1900 |
| 41 | 37900 | 2000 |
| 42 | 39900 | 2150 |
| 43 | 42050 | 2200 |
| 44 | 44250 | 2300 |
| 45 | 46550 | 2400 |
| 46 | 48950 | 2600 |
| 47 | 51550 | 2600 |
| 48 | 54150 | 2800 |
| 49 | 56950 | 3000 |
| 50 | 59950 |