Entropy
★★★★★ 5★
Ice
Mio Natsukawa
Frigid Water
Ice
Mio Natsukawa
Frigid Water
Entropy in 10 seconds
Entropy is a 5★ weapon — Mio Natsukawa.
Skill
Frigid Water
Refine +0Increase ailment accuracy by 36.0%. During battle, for every 66.0% of Natsukawa's ailment accuracy, increase Attack. Also, each time an Ice Technical is activated, decrease the target's Defense by 23.3% more for 2 turns.
Stats
| HP | ATK | DEF | |
|---|---|---|---|
| Level 1 | 188 | 54 | 33 |
| Level 80 (max breach) | 2,338 | 673 | 414 |
| Per level | +21.15 | +6.08 | +3.71 |
Bars compare against the strongest P5X weapon (799 ATK · 2,873 HP · 537 DEF at max level).
Breach & materials
| HP | ATK | DEF | Material | |
|---|---|---|---|---|
| Tier 1 | +67.14 | +19.29 | +11.79 | Blue Crystal ×5 |
| Tier 2 | +67.14 | +19.29 | +11.79 | Blue Crystal ×12 |
| Tier 3 | +67.14 | +19.29 | +11.79 | Purple Crystal ×6 |
| Tier 4 | +67.14 | +19.29 | +11.79 | Purple Crystal ×10 |
| Tier 5 | +67.14 | +19.29 | +11.79 | Purple Crystal ×18 |
| Tier 6 | +67.14 | +19.29 | +11.79 | Yellow Crystal ×12 |
| Tier 7 | +67.14 | +19.29 | +11.79 | Yellow Crystal ×24 |
Named breach-material table for every one of the 7 tiers (cross-checked against the official dump — community sources do not list this level of detail).
How to obtain
Weapon-selection voucher / 5★ selection box exchange
Weapon mechanics (applies to every P5X weapon)
Weapons are hard-locked to one character — they cannot be swapped to another character.
Weapon level is SHARED: leveling up any one weapon raises the level of every other weapon owned by that same character, regardless of rarity. Level cap is 80, reached via 7 breach overclocks using crystals (Blue/Purple/Yellow).
Forging is NOT shared — each weapon forges independently. Even-numbered forge steps (0/2/4/6) need a duplicate of the exact same weapon; odd-numbered steps (1/3/5) accept any weapon of the same rarity.
Exclusive owner
More Mio Natsukawa weapons
Frequently asked questions
Who wields Entropy in P5X?
Entropy is exclusively equipped by Mio Natsukawa and cannot be transferred to another character.
How do I get Entropy?
Weapon-selection voucher / 5★ selection box exchange
What materials does Entropy need to breach?
All 7 breach tiers to Lv.80 need 17× Blue Crystal, 34× Purple Crystal, 36× Yellow Crystal.
Is Entropy worth upgrading?
Weapon level is shared with every weapon owned by the same character (no extra cost there), but forging is per-weapon — worth it mainly if you actively use this character.