Let's prepare for the upcoming 2.4 characters in Wuthering Waves. Btw, the 2.4 banner has no reruns. I think Cartethyia's weapon is a must-get since its one-of-a-kind DPS weapon with HP substat. Lupa can probably use Jiyan or Jinhsi's weapon.

Cartethyia Prefarm

Ascension Materials

To fully ascend Cartethyia from level 0 to 90, you’ll need the following materials:

Bamboo Iris (60): Found in the Septimont region, a new area introduced in Version 2.4.

Unfading Glory (26): Dropped by the Lioness of Glory, an overworld boss in Septimont. This boss becomes accessible post-Version 2.4 update.

Tidal Residuum:
LF Tidal Residuum (4)
MF Tidal Residuum (12)
HF Tidal Residuum (12)
FF Tidal Residuum (4)

These are enemy drops from Echoes in Rinascita. Use the in-game guide to track enemies dropping Tidal Residuum by selecting it in the material tracker and fast-traveling to marked locations.

Shell Credit x170,000 for ascension, 870k for leveling up.

Forte Materials

Metallic Drip:
Inert Metallic Drip (25)
Reactive Metallic Drip (28)
Polarized Metallic Drip (55)
Heterized Metallic Drip (67)

Shell Credit x2,030,000

When Irises Bloom (26): Dropped by the Fleurdelys weekly boss in Avinoleum, Rinascita, unlocked after completing Chapter 2 Act 5: The Maiden, The Defier, The Death Crier.

Tidal Residuum:
LF Tidal Residuum (25)
MF Tidal Residuum (28)
HF Tidal Residuum (40)
FF Tidal Residuum (57)

Weapon Materials

LF Howler Core (6)
MF Howler Core (6)
HF Howler Core (10)
FF Howler Core (12)

Inert Metallic Drip (6)
Reactive Metallic Drip (8)
Polarized Metallic Drip (6)
Heterized Metallic Drip (20)

Shell Credits 330,000

Lupa Prefarm

Ascension Materials

To fully ascend Lupa from level 0 to 90, you’ll need the following materials:

Bloodleaf Viburnum (60): Found in the Septimont region, a new area introduced in Version 2.4.

Unfading Glory (26): Dropped by the Lioness of Glory, an overworld boss in Septimont. This boss becomes accessible post-Version 2.4 update.

Howler Core:
LF Howler Core (4)
MF Howler Core (12)
HF Howler Core (12)
FF Howler Core (4)

These are enemy drops from Echoes in Rinascita. Use the in-game guide to track enemies dropping Tidal Residuum by selecting it in the material tracker and fast-traveling to marked locations.

Shell Credit x170,000 for ascension, 870k for leveling up.

Forte Materials

Waveworn Residue:
Waveworn Residue 210 (25)
Waveworn Residue 226 (28)
Waveworn Residue 235 (55)
Waveworn Residue 239 (67)

Shell Credit x2,030,000

The Netherworld’s Stare (26): Dropped by the Hecate weekly boss near Ragunna, Rinascita, accessible after Chapter 2 Act 3: What Yesterday Wept, Today Doth Sing.

Howler Core:
LF Howler Core (25)
MF Howler Core (28)
HF Howler Core (40)
FF Howler Core (57)

Weapon Materials

LF Howler Core (6)
MF Howler Core (6)
HF Howler Core (10)
FF Howler Core (12)

Waveworn Residue 210 (6)
Waveworn Residue 226 (8)
Waveworn Residue 235 (6)
Waveworn Residue 239 (20)

Shell Credits 330,000