Levelling up directly increases character's stats, which improves their combat effectiveness directly. Instead of characters getting exp and the like from clearing quests, characters require battle records and draco to level up. And each character has their own stat growth, and benefits from levelling differently. The stats that grow through levelling would be HP, ATK, and DEF. After a character reaches their maximum level their Rank can be increased.
Requirements to increase a character's level scales exponentially as their level goes higher. There is a 1:1.1 ratio on the required cost for exp and draco. And the stat gains don't necessarily scale higher as they gain levels, instead grow linearly. Due to this, it is ideal to mostly cap a character's level if you're invested in ranking them up or simply maxing them out, and otherwise keep them at certain threshold where costs aren't too steep.
The best way to acquire Draco and Battle Records is from Exploration Quests.
Icon
Name
Exp
Draco
Battle Record I
200
220
Battle Record II
400
440
Battle Record III
1000
1100
Battle Record IV
2000
2200
Maximum Level
Rarity
Bronze
Silver
Gold
6★
50
80
90
5★
50
70
80
4★
45
60
70
3★
40
55
2★
30
1★
30
The amount of Experience and Draco required to level up characters increases exponentially with each level and rank. It's more efficient to level up multiple characters simultaneously rather than focusing on one character.
Target
Exp Calculations
Draco Calculations
Totals
Rank
Level
Experience
B-3 Plays
Stamina
Days
Draco
A-3 Plays
Stamina
Days
Plays
Stamina
Days
Bronze
50
24142
6
102
0.4
26556
8
136
0.6
14
238
1.0
Silver
55
78818
19
323
1.3
86700
25
425
1.8
44
748
3.1
Silver
60
109103
26
442
1.8
120013
35
595
2.5
61
1037
4.3
Silver
70
207488
50
850
3.5
228237
66
1122
4.7
116
1972
8.2
Silver
80
392233
94
1598
6.7
431456
124
2108
8.8
218
3706
15.4
*Silver rank calculations start at Silver Rank Level 1
Bronze Rank: Cumulative EXP and Draco needed to Level Up
Level
Required Exp
Required Draco
1
0
0
2
100
110
3
206
227
4
???
???
5
432
475
6
???
???
7
680
748
8
813
894
9
???
???
10
1098
1208
11
1252
1377
12
1414
1555
13
????
????
14
1763
1939
15
1952
2147
16
2151
2366
17
2361
2597
18
2582
2840
19
2815
3097
20
3061
3367
21
3321
3653
22
3595
3955
23
3885
4274
24
4191
4610
25
4515
4967
Level
Required Exp
Required Draco
26
4858
5344
27
5221
5743
28
5606
6167
29
6014
6615
30
6447
7092
31
6906
7597
32
7394
8133
33
7912
8703
34
8463
9309
35
9049
9954
36
9672
10639
37
10334
11367
38
11038
12142
39
11788
12967
40
12587
13846
41
13438
14782
42
14344
15778
43
15310
16841
44
16340
17974
45
17438
19182
46
18610
20471
47
19861
21847
48
21196
23316
49
22621
24883
50
24142
26556
Silver Rank: Cumulative EXP and Draco needed to Level Up
