Source, AI translation:

Top 3-Line Summary

1. I tested these characters in basic training.
2. Absolutely do not take this as gospel.
3. Take a look at their panties before you go.

1. Nono (A-Rank Earth, Destruction Position)

• Gameplay: Hammer DPS relying on charged/hold attacks.
• Panties: Pumpkin pants (bloomers).

2. Xiaoyu (S-Rank Wind, Assault Position)

• Gameplay: Builds up the gauge with charged attacks, then deals damage with normal attacks.
• Panties: Chinese-style censored panties with a flower on them.

3. Luluka (S-Rank Water, Imbue Position)

• Gameplay: Summoner-concept support with a heal; deals damage via charged attacks.
• Panties: Black string (Shows the least out of all the skirt-wearing characters).

4. Ruby (S-Rank Fire, Assault Position)

• Gameplay: Moving-fire concept dual-pistol DPS. Easy and strong.
• Panties: Black Chinese-style censored panties.

5. Lily (A-Rank Wind, Amplify Position)

• Gameplay: Parry-specialized support. The parrying feels incredibly satisfying.
• Panties: The texture clips into her back, so I don't even want to call them panties. Hot pants.

6. Metsa (S-Rank Wood, Imbue Position)

• Gameplay: A support that has everything: mob gathering, defense shred, and healing.
• Panties: White texture over a degenerate/exposed outfit. Seeing as she has a 24/7 blush, I'm personally arguing she is going commando.

7. Morwyn [aka Yuuka/Keqing] (S-Rank Electric, Assault Position)

• Gameplay: Dual-sword DPS utilizing high-speed strikes. Easy and strong.
• Panties: Black Chinese-style censored panties.

8. Mitti (A-Rank Electric, Burst Position)

• Gameplay: Heavy attack-focused ranged DPS. Expected to pair up perfectly with Morwyn.
• Panties: Black panties exposed 24/7 due to her ultra-mini skirt.

9. Shalle (S-Rank Light, Burst Position)

• Gameplay: One of only two Light-element characters in the CBT + the only Light DPS. Fights using a cavalry lance.
• Panties: White Chinese-style censored panties (They look so much like boxers they just seem like shorts).

10. Protagonist / Starborn (Non-Elemental, Amplify Position)

• Gameplay: The only non-elemental character. A highly versatile DPS/Support hybrid.
• Panties: Blue striped panties (Belly awkwardly sticks out a bit during the parry stance).

11. Symphoria (A-Rank Wind, Burst Position)

• Gameplay: Stack-based DPS that mixes normal attacks, charged attacks, and skills altogether.
• Panties: Became blue hot pants due to censorship.

12. Abby (S-Rank Water, Destruction Position)

• Gameplay: A dragon girl who deals damage using Iron Reaver Soul Stealer (claw attacks) and Hydro Pump.
• Panties: Tights? Pantyhose? Leggings? (I'm not into lolis, so I don't care).

13. Anais (A-Rank Light, Imbue Position)

• Gameplay: Your standard omnipresent support character capable of healing.
• Panties: Real white triangle panties (Hard to see due to the long skirt).

14. Kataru (A-Rank Earth, Amplify Position)

• Gameplay: Shield and counter-concept support rocking the "Dongtan" underboob look. Since her kit revolves around getting hit to counter, she's expected to be either totally broken or complete trash.
• Panties: Black panties (Hard to see because her clothes are so skin-tight).

15. Cathbelle (A-Rank Electric, Destruction Position)

• Gameplay: Horned maid doing a Dynasty Warriors sweep with an axe.
• Panties: Looks like someone cut up pantyhose to make panties out of them (If you look closely, you can see the hole textures).

16. Faridah (S-Rank Wind, Destruction Position)

• Gameplay: Plays like the neighbor's Cyno [from Genshin Impact]; she has the clunkiness of needing to time your normal attacks perfectly. I personally hate this character.
• Panties: None.

17. Terara (A-Rank Fire, Assault Position)

• Gameplay: A DPS who uses a charged attack as a finisher after her normal attacks and skills. The most average of the average.
• Panties: Black panties exposed 24/7 due to an ultra-mini skirt.

18. Pengpeng (A-Rank Fire, Burst Position)

• Gameplay: Along with Nono, she fits the shortest-character martial artist concept. If you spam-click during her final hit to do continuous kicks, she falls over just like in the gifs.
• Panties: Black safety shorts/spats.

19. Han (A-Rank Fire, Amplify Position)

• Gameplay: A firework lover doing acrobatics and splitting her legs. Expected to be a great partner for Lucy.