Talia

Being able to provide teamwide mana battery, Talia has been a staple across all stages in story mode from early to endgame. On top of the mana she gives from main skill and ultimate, her subs all give her team respectable durability consisting of barriers, Def buff, reducing enemy accuracy, and increasing the team’s Def as well as Atk. Her ult is extremely helpful, dealing a respectable amount of damage, healing, and providing mana regeneration, all of which stabilize your team to survive into the next ult. That beng said, she doesn't really need to ult to shine - her ultimate is mostly used in content where you need extra sustain, like clearing higher lab stages, or content where you can only use each ultimate once like tower of origin. Being a cleanser, she also has excellent usage when facing enemies with any kind of debuffs like bleed, heal reduction, or Atk/Def reduction. She can also dispel on her sub, but this is a bit unreliable. Talia shines as a battery, pseudo healer and buffer - while she works great in her own faction teams she is also very appreciated in Liz teams, where her role coverage is invaluable. Talia can find place in virtually any team comp for her buffing, healing and cleansing capabilities. In PvP Talia is a staple support, especially due to her mana battery.