Lv

Courtesy of the WikiWiki (http://wikiwiki.jp/housamo/?LV) for providing data.

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.

${\text{Required coins}}=(100+20*{\text{Current LV}}*{\text{Number of slots filled}})$

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