Commander Lorina

Crazy DPS

Commander Lorina's passive is basically a 50~75% Attack buff that does not run out and cannot be dispelled. When you take her high base Attack stat and other damage bonuses into account, her damage output is outstanding for a 3★ Hero.

Kills Bosses, Farms Mobs

Though Commander Lorina excels at dueling big, meaty bosses, that's not all she's good for. Once buffed through her Skill Tree, her S3 has a chance to reset its cooldown if it kills its target. This can make Commander Lorina a decent farmer if you don't have strong AOE options like Lena or Vildred.

Combat Readiness Manipulation

Commander Lorina's S3 packs a large CR decrease, dramatically slowing its victim's next turn. When Soulburned, her S3 also grants her an extra turn, allowing her to further outrun her enemies. On top of that, her S1 gives her CR (and may grant double the amount after it has been buffed through her Skill Tree). Especially when facing single targets (like PvE bosses), Commander Lorina can get multiple turns to their one even if her Speed is not that high.

Free Connection Hero

Lorina is one of the small pool of Connection heroes that are free-to-play in Epic Seven. Every player is guaranteed to recruit Lorina just by completing her Connection quest, and then every player can promote her into Commander Lorina by completing Lorina's Specialty Change quest. While completing these quests can take time, the fact that they are guaranteed to give you a big bosskiller is a massive plus.

Dark Element

Being a Dark-elemental hero means that Commander Lorina never suffers from elemental disadvantage. It's like having a Fire, Ice, and Earth bosskiller in your roster, but only having to Awaken and gear one of them. This is especially useful for new players with limited resources: investment in Commander Lorina is investment that can help you in any boss fight, regardless of element.

Fragile

Commander Lorina has terrible HP and Defense, and most of her Specialty Change buffs don't do much to fix this. In addition, sometimes her taking multiple turns in a row can backfire on her, since it means durability buffs like Defense Up or Continuous Healing may run out before she needs them.

Buffs Can Conflict

Commander Lorina's passive stacks additively with other Attack buffs, not multiplicatively. This means that where other heroes get a 50% damage boost, Commander Lorina will be seeing something like a 35% boost (but the amount of damage that gets boosted is the same). Commander Lorina synergizes better with Crit Damage buffs, which are much rarer in Epic Seven.

Takes Time to Ramp Up

It takes time for Commander Lorina to warm up -- 5 attacks' worth of time, in fact. That's a long time in PvE and basically impossible in PvP. Commander Lorina is too fragile to use a Counter set and her extra-turn Soulburn is very expensive, so it can't be spammed as a work-around. She needs either a lot of CR-push or multiple turns to max out her passive and really become dangerous.

Erratic CR Manipulation

The CR-push on Commander Lorina's S1 has an RNG element to it, and she doesn't get any CR at all on turns when she uses her S3 instead. Unpredictable CR-push can save the day, but it can also mess up your turn order. Your Commander Lorina might move before she can be buffed on some turns, or get her turn right after the boss has been able to Stun her on other turns.