Version 2.6 introduces Sunna, an S-Rank Physical Support Agent, with signature Thoughtbop W-Engine (713 Base ATK, 60% Energy Regen at max). Running February 6-27, 2026, the banner needs up to 28,800 Polychromes for guaranteed acquisition. This guide analyzes whether Thoughtbop's stackable Physical DMG buffs justify investment versus alternatives like Weeping Cradle.
Version 2.6 Sunna Banner Overview
Launches February 6, 2026 at 11:00 AM UTC+8. Character banner runs 21 days until February 27, while Thoughtbop W-Engine extends through March 4 under Dissonant Sonata event.
Sunna's max stats: 7,896 ATK, 5,095 HP, 666 DEF, 110 Impact, 110 Anomaly Mastery. Kit centers on Physical damage enablement through energy generation and defensive debuffs.
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Banner Pity Mechanics
0.6% base S-Rank rate
Soft pity: pull 75
Hard pity: pull 90
First S-Rank: 50/50 featured character
Worst-case: 180 pulls (28,800 Polychromes)
Per-pull cost: 160 Polychromes
Pity carries over but resets on S-Rank acquisition
W-Engine banner operates independently. Pursuing both needs 360 pulls worst-case, though most secure both within 240-270 pulls.
Sunna Character Analysis
Physical Support specialist whose value scales with team composition. Core passive generates energy while applying Investigation Zone debuffs: -7% enemy DEF per stack (max 3 stacks, 40s duration, 180s cooldown at M1).
Skill Kit Breakdown
Mesmerized state deals 210-500% ATK Physical DMG as guaranteed crits with +100% CRIT DMG for 12s. Energy generation reduces rotation downtime for energy-hungry DPS.
At M2: +10% ATK during Ether Veil, one Claw Sharpener stack per 10s. Cat's Gaze amplifies Attack DMG by 200%, Anomaly DMG by 300%.
Skill priority:
Core Passive (energy generation scaling)
Special Attack (burst damage windows)
Basic Attack (on-field playstyle only)
Chain/Assist/Dodge (situational)
Optimal Team Compositions
Ye Shunguang - Sunna - Zhao: Max Physical damage + defense
Ye Shunguang - Sunna - Dialyn: Alternative defensive support
Aria - Billy - Sunna: F2P Physical team
Aria - Anby - Sunna: Hybrid crowd control
Nangboo The Biggest Fan Bangboo shares Sunna's stats (7,896 ATK, 110 Anomaly Mastery, 50% CRIT Rate, 100% CRIT DMG, 110 Impact).
Meta Position
Occupies specialized niche, not universal meta. Value requires specific roster investments. Without Physical DPS characters, evaluate whether building entire team archetype justifies resources versus strengthening existing compositions.
Thoughtbop W-Engine Breakdown
Scales from 123 Base ATK/24% Energy Regen (level 10) to 713 Base ATK/60% Energy Regen (level 60).
Max upgrade requirements:
400,000 Denny
4 Support Components
32 Reinforced Support Components
30 Specialized Support Components
Passive Effect
Provides 0.6 Energy Regen/s off-field. EX Special grants 12.5% Physical DMG for 40s, stacking 2x with +10% ATK at max stacks.
Combat benefits:
25% total Physical DMG (12.5% × 2 stacks)
10% ATK bonus at max stacks
Continuous off-field energy generation
40s buff duration for flexible rotations
Refinement Analysis
R1→R2 provides most significant improvement. Subsequent refinements offer diminishing returns. Single copy delivers 80-85% of max potential.
Sunna's M1 (+15 Energy on entry, Investigation Zone DEF -7% for 40s stack 3) often provides better value than refining Thoughtbop.
Universal Compatibility
Physical Attribute + Support W-Engine classification limits cross-character utility. View as character-locked investment, not flexible roster tool.
Damage Comparison: Thoughtbop vs Alternatives
Top 5 Alternative W-Engines:
Weeping Cradle (684 Base ATK, 24% PEN Ratio, 0.6/s ER): 90-95% performance in mixed-defense scenarios
Kaboom the Cannon (624 Base ATK, 50% ER): 85-90% damage, superior rotation flexibility
Standard S-Rank Support: 75-80% effectiveness, lower acquisition costs
A-Rank alternatives: 60-70% performance, F2P viable
Generic stat sticks: 50-60% effectiveness, not recommended
Performance Gap
Shiyu Defense testing shows Thoughtbop provides:
15-20% team damage vs high-defense enemies over Weeping Cradle
8-12% vs balanced stat distributions
5-8% vs low-defense targets
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Takeaway: Thoughtbop represents luxury optimization, not mandatory equipment. Alternatives achieve 85-90% max performance.
Should You Pull? Decision Framework
New Players (Account Level <40)
Prioritize character diversity over signature W-Engines. Skip Thoughtbop unless Sunna completes functional Physical team with existing DPS.
F2P Players
Earn 8,000-12,000 Polychromes per patch (50-75 pulls)—insufficient for character + W-Engine guarantee.
Resource priority:
Character acquisition over signature W-Engines (90% of cases)
M1 for meta-defining characters over new units
Alternative W-Engines from standard banner
Strategic skipping of specialized supports without DPS investments
Monthly Pass Holders
Inter-Knot Membership adds 3,000 Polychromes/30 days (18-19 pulls/month). Enables one guaranteed S-Rank per patch with planning.
Optimal value:
Secure featured characters at guaranteed pity
Pursue signature W-Engines for primary DPS/irreplaceable supports only
Use alternative W-Engines for secondary team members
Maintain reserves for meta-shifting releases
Collectors and Meta Chasers
Evaluate Thoughtbop based on Physical team investment depth. Multiple Physical compositions justify acquisition for measurable performance gains.
Red Flags: Skip If
No Physical DPS (Ye Shunguang, Aria, Billy) in roster
Version 2.7 leaks suggest higher-priority releases
Current pity <70 with insufficient resources
Existing support roster covers Physical requirements
Account focuses on non-Physical damage types
Investment Cost Analysis
Polychrome Requirements
Worst-case character: 180 pulls × 160 Polychromes = 28,800 Polychromes. Existing pity reduces proportionally.
Combined Guarantee Costs
Character guarantee: 28,800 Polychromes (180 pulls)
W-Engine guarantee: 28,800 Polychromes (180 pulls)
Combined total: 57,600 Polychromes (360 pulls)
70% of players obtain both within 240-270 pulls (38,400-43,200 Polychromes).
Worst-Case Breakdown
Polychrome farming: 8,000-12,000/patch (F2P)
Inter-Knot Membership: +3,000/month
Remaining shortfall: 42,600-46,600 Polychromes
Master Tape equivalent: 266-291 tapes via purchase
Farming Strategies (21-Day Banner)
Daily commissions: 60/day = 1,260 Polychromes (7-8 pulls)
Version events: 1,500-2,500
Exploration rewards: 800-1,200
Shiyu Defense: 600-800/reset
Hollow Zero: 400-600
Maintenance compensation: 300-600
Common Misconceptions
Myth: Signature W-Engine Required
Reality: Sunna functions at 85-90% effectiveness with Weeping Cradle, 80-85% with Kaboom the Cannon—both obtainable through standard banner.
Performance Thresholds
Shiyu Defense floor 15 requires ~75-80% of theoretical max damage, achievable with alternative W-Engines. Final 15-20% gain enables faster clears, not content completion.
When Signatures Matter
Competitive leaderboards (5-10% damage differences)
Speed-clear challenges (strict time requirements)
Undergeared account compensation
Future-proofing against power creep
For casual players, alternatives deliver sufficient performance at fraction of cost.
Future-Proofing
Version 2.7 Meta Predictions
Leaks suggest shifts toward Ether/Electric damage types, potentially reducing Physical team priority. Weigh immediate Sunna investment against rumored releases offering broader compatibility.
Long-Term Viability
Supporting factors:
Unique energy generation mechanics
Defensive debuff stacking with future Physical DPS
Mindscape scaling for sustained relevance
Obsolescence risks:
Narrow team compatibility
Meta shift if Physical damage declines
Future support releases with superior utility
Strategic Allocation
Maintain 28,800 Polychrome reserves for meta-defining releases. Treat specialized supports like Sunna as optional acquisitions dependent on roster synergies.
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Final Verdict
Pull Sunna + Thoughtbop If:
You main Physical DPS (Ye Shunguang, Aria)
You're a collector
You have 50,000+ Polychromes
You compete on leaderboards
Pull Sunna, Skip Thoughtbop If:
You need Physical support but have limited resources
You can use alternative W-Engines
You prefer character diversity
You're F2P/light spender prioritizing characters
Skip Entirely If:
You lack Physical DPS characters
You focus on non-Physical teams
You're saving for version 2.7
You have existing Physical support
Alternative Strategies
Redirect resources toward:
Strengthening existing teams via Mindscapes
Diversifying damage type coverage
Building reserves for meta-defining releases
Investing in universal supports
Next Steps
Audit roster for Physical DPS availability
Calculate available Polychromes + event rewards
Check current pity progress
Review version 2.7 leak information
Make account-specific decision
Sunna represents specialized investment, not universal must-pull. Players with established Physical teams gain value; those lacking synergistic pieces should prioritize alternative allocations.
FAQ
Is Thoughtbop necessary for Sunna?
No. Sunna performs at 85-90% with Weeping Cradle or 80-85% with Kaboom the Cannon. Thoughtbop provides 15-20% team damage increase vs high-defense enemies but represents luxury optimization, not mandatory equipment.
How much to guarantee both?
Worst-case: 360 pulls (57,600 Polychromes)—180 per banner at 160 each. 70% of players obtain both within 240-270 pulls (38,400-43,200 Polychromes). F2P earn 8,000-12,000/patch, requiring top-up for dual guarantee.
Best alternative W-Engines?
Weeping Cradle (684 Base ATK, 24% PEN Ratio, 0.6/s ER): 90-95% performance. Kaboom the Cannon (624 Base ATK, 50% ER): 85-90% damage. Standard S-Rank Support: 75-80% effectiveness at lower cost.
Should F2P pull signature W-Engine?
Prioritize character acquisition in 90% of cases. With 50-75 pulls/patch, resources rarely support both guarantees. Alternatives provide 80-90% performance while preserving resources.
Best team compositions?
Ye Shunguang-Sunna-Zhao (max Physical damage), Ye Shunguang-Sunna-Dialyn (alternative defense), Aria-Billy-Sunna (F2P), Aria-Anby-Sunna (hybrid control). Nangboo Bangboo for ideal stat sync.
Is Sunna worth pulling February 2026?
Only if you have invested Physical DPS (Ye Shunguang, Aria, Billy). Without Physical foundations, skip for universal utility characters. Version 2.7 Ether/Electric meta shifts reduce Physical investment priority.