diff --git a/sonic-radiance.love/game/abstractmobs/utils.lua b/sonic-radiance.love/game/abstractmobs/utils.lua
new file mode 100644
index 0000000..fc85fbc
--- /dev/null
+++ b/sonic-radiance.love/game/abstractmobs/utils.lua
@@ -0,0 +1,32 @@
+local StatsUtils = {}
+
+local CONST = {}
+
+CONST.EXP_MULTIPLICATOR = 4
+CONST.EXP_RATIO = 5
+
+CONST.BASE_STAT = 5
+CONST.BASE_HP = 15
+CONST.BASE_MP = 8
+
+CONST.MULT_STAT = 2
+CONST.MULT_HP = 2.7
+CONST.MULT_MP = 1.5
+
+function StatsUtils.getExpValue(level)
+  return math.floor( ( CONST.EXP_MULTIPLICATOR * ( level ^ 3 ) ) / CONST.EXP_RATIO )
+end
+
+function StatsUtils.getStatValue(level, base)
+  return math.floor( (((base * CONST.MULT_STAT) * level)/100) ) + CONST.BASE_STAT
+end
+
+function StatsUtils.getHPValue(level, base)
+  return math.floor( (((base * CONST.MULT_HP) * level)/100) ) + CONST.BASE_HP + level
+end
+
+function StatsUtils.getPPValue(level, base)
+  return math.floor( (((base * CONST.MULT_MP) * level)/100) ) + CONST.BASE_MP
+end
+
+return StatsUtils
diff --git a/sonic-radiance.love/game/characters.lua b/sonic-radiance.love/game/characters.lua
index 1d45d8c..32bb403 100644
--- a/sonic-radiance.love/game/characters.lua
+++ b/sonic-radiance.love/game/characters.lua
@@ -24,6 +24,8 @@
 
 local CharacterManager = Object:extend()
 
+local statsutils = require "game.abstractmobs.utils"
+
 function CharacterManager:new(controller)
   self.controller = controller
   self.namelist = require "datas.gamedata.characters"
@@ -59,8 +61,8 @@ function CharacterManager:initCharacter(id)
   local character = self:getCharacterData(id)
 
   stats.level     = character.startlevel
-  stats.exp       = self:getExpValue(stats.level)
-  stats.exp_next  = self:getExpValue(stats.level + 1)
+  stats.exp       = statsutils.getExpValue(stats.level)
+  stats.exp_next  = statsutils.getExpValue(stats.level + 1)
   stats.hpmax     = character.base_stats.hpmax
   stats.ppmax     = character.base_stats.ppmax
   stats.attack    = character.base_stats.attack
@@ -83,16 +85,12 @@ function CharacterManager:initCharacter(id)
   self.list[id] = character
 end
 
-function CharacterManager:getExpValue(level)
-  return math.floor( ( 4 * ( level ^ 3 ) ) / 5 )
-end
-
 function CharacterManager:setLevel(id, newlevel)
   self.list[id].stats.level = newlevel
   local stats = self.list[id].stats
   local exp, exp_next, exp_current
-  exp         = self:getExpValue(stats.level)
-  exp_next    = self:getExpValue(stats.level + 1)
+  exp         = statsutils.getExpValue(stats.level)
+  exp_next    = statsutils.getExpValue(stats.level + 1)
   exp_current = self.list[id].stats.exp
 
   self.list[id].stats.exp = math.max(math.min(exp_current, exp_next - 1), exp)
@@ -105,31 +103,19 @@ function CharacterManager:levelUp(id)
   self:setLevel(id, self.list[id].stats.level + 1)
 end
 
-function CharacterManager:getStatValue(level, base)
-  return math.floor( (((base * 2) * level)/100) ) + 5
-end
-
-function CharacterManager:getHPValue(level, base)
-  return math.floor( (((base * 2.7) * level)/100) ) + 15 + level
-end
-
-function CharacterManager:getPPValue(level, base)
-  return math.floor( (((base * 1.5) * level)/100) ) + 8
-end
-
 function CharacterManager:recalculateStats(id)
   local character   = self.list[id]
   local stats       = character.stats
   local base_stats  = character.base_stats
 
-  stats.hpmax     = self:getHPValue(stats.level,    base_stats.hpmax)
-  stats.ppmax     = self:getPPValue(stats.level,    base_stats.ppmax)
-  stats.attack    = self:getStatValue(stats.level,  base_stats.attack)
-  stats.power     = self:getStatValue(stats.level,  base_stats.power)
-  stats.defense   = self:getStatValue(stats.level,  base_stats.defense)
-  stats.mind      = self:getStatValue(stats.level,  base_stats.mind)
-  stats.technic   = self:getStatValue(stats.level,  base_stats.technic)
-  stats.speed     = self:getStatValue(stats.level,  base_stats.speed)
+  stats.hpmax     = statsutils.getHPValue(stats.level,    base_stats.hpmax)
+  stats.ppmax     = statsutils.getPPValue(stats.level,    base_stats.ppmax)
+  stats.attack    = statsutils.getStatValue(stats.level,  base_stats.attack)
+  stats.power     = statsutils.getStatValue(stats.level,  base_stats.power)
+  stats.defense   = statsutils.getStatValue(stats.level,  base_stats.defense)
+  stats.mind      = statsutils.getStatValue(stats.level,  base_stats.mind)
+  stats.technic   = statsutils.getStatValue(stats.level,  base_stats.technic)
+  stats.speed     = statsutils.getStatValue(stats.level,  base_stats.speed)
 end
 
 function CharacterManager:getSkillList(id)