Pets are companions in Seven Knights Re:BIRTH that raise the stats of the heroes in your party without taking up a hero slot. They're sorted into Legendary, Rare, Uncommon and Common tiers, and you get them from eggs, summons and fusion. You can collect and keep track of every pet in the game as you build your teams.
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What Pets Do in Seven Knights Re:BIRTH
Pets are support companions. Add one to a party and the heroes in that party get stronger, and the pet doesn't use up one of your hero slots. You'll see their effect in the main modes, including Adventure, Raids, Arena and Tower.
Heroes still matter more in the early and middle game, so build up your heroes first. It's smart to start spending on pets once you own a Legendary one, since those are the pets worth building around.
Pet Rarity: Legendary, Rare, Uncommon and Common
Every pet belongs to one of four rarity tiers, from Common at the bottom to Legendary at the top. The rarer the pet, the better its skill. Legendary pets also have more room to grow, with up to 4 bond levels and 4 potential slots, while Rare pets stop at 3 of each.
That's why serious investment usually goes into Legendary pets. Uncommon and Common pets are mostly early stepping stones, so you'll likely replace them as you find better ones.
How to Get Pets in Seven Knights Re:BIRTH
Pet content opens after you clear Adventure 3-5, and from there pets come from eggs, summons and fusion.
Eggs are a main way in. You register them in Grow Pets under Hatch, and each one hatches into a pet, usually 1 to 3 stars. Hatching can give you duplicates, which you'll need later, and now and then a pet of a higher rarity. Eggs also drop from later Normal Adventure areas, and they're sold in some shops and exchanges or handed out through events.
Summons use Pet Summon Tickets or Rubies. Summoning is the most direct way to chase one specific pet, but it can use up resources quickly, so decide your budget before you start.
Fusion combines two pets of the same rank into one. The result is random, landing on that same rank or one rank higher, and the pets don't need to be enhanced first. Stepping up is a long shot, especially from 3 stars to 4 stars, so fusion works best for turning spare pets into a stronger one.
Crafting and material exchanges cover some pets too, so check the material cost before you spend.
How to Rank Up Pets
Growing a pet comes down to enhancement and rank up. First, enhance the pet to +5, which uses Gold and other materials. Then get a second copy of the same pet, enhance that copy to +5 as well, and use it as the material for a rank up in Grow Pets.
The pet and the copy must be the same pet at the same rank, so keep the duplicates you need and don't release them by mistake. Repeat the process until the pet reaches 6 stars, which takes several copies in total. It's worth putting your Gold and rare materials into a Legendary pet you plan to keep rather than spreading them across many pets.
Pet Bond, Potential and Skill Enhancement
Bond, potential and skill enhancement are the last steps of growing a pet. Bond rises when you give a pet Star Fragments or Star Crystals as gifts. Higher bond opens potential slots. Bond maxes out at the same level as the potential slots.
Potential gives a random bonus to your whole party, such as more total HP, Attack or Defense. You spend Star Crystals or Star Fragments to fill an open slot with a random effect.
Skill enhancement is separate and costs stones. Legendary pets use Brilliant Skill Enhancement Stones, and Rare pets use regular Skill Enhancement Stones. Each level costs more stones than the one before, so put them into the pets you'll keep using.
Releasing is where you get the materials for bond and potential. Releasing a Rare pet gives Star Fragments, and releasing a Legendary pet gives Star Crystals. Keep any copy you still need for a rank up before you release anything.
Best Pets in Seven Knights Re:BIRTH
A few pets stand out, but the best pick depends on your heroes and what you're doing, and rankings shift with each update. Richel and Kree are the broadest choices, since their boosts help nearly any damage dealer. Ruu and Pike are the defensive picks for keeping a team alive in tough fights.
For crit builds, Dello and Little Feng are the strongest choices, and Nina is a cheaper Rare option for crit rate. Yeonji is the pick for magic teams and Eirin for physical ones. Windy is the one to favor for boss fights, while Mole and Mick help with gear and gold if you farm for them.
FAQ
Do pets have levels?
No. A pet doesn't gain levels from quests, so there's no grinding to make it stronger. Its strength comes from enhancing it and ranking it up, which means the copies and materials you put in matter most.
Should I enhance Common and Uncommon pets?
Usually not. Their best use is as fusion material, so keep them for fusing rather than spending Gold and materials on enhancing them.
Can I reroll a pet's potential?
Yes, but granting a potential again overwrites the current effect. Rerolls drain resources quickly, so fill every open slot before you chase a specific effect.
Are pets useful in PvP?
Yes. Kree is a strong pick here, since its effect hit rate helps crowd control land reliably, which counts for a lot in PvP. Pike is a good partner, because its effect resistance helps against the debuffs that show up in tough fights.

