Merrymaking Countess, Runelis

Your translation skills: Berry could

Actually TPAs are stronger and easier to use in my opinion, this is why:
Both TPA and attack L give 1.5x ATK each.
TPA needs 4 orbs, attack L 5 orb AND the L shaped combo
you can easily fit 2-3 TPA (up to a maximum of 4 TPA in a board 5x6), while is way harder to fit 2 L shaped combos in a 5x6 board.
Moreover Gronia has 2 7c which grants her a total of 4x ATK when reaching 7 combos.
Attack L unlocks locked orbs, and that's nice, but you'll just need one L skill in the team. Indeed it is nice to have an ATK boost while unlocking orbs, but that's all, I wouldn't focus my team DMG output on that awoken skill.
I'd still go for TPA, but surely Mega Gronia is an awesome leader.

It's easy to fit 2 Ls on a 5x6. It's harder to have the orbs and time to fit 3. But it can be done. Actually 4 can fit, if they are two different colors.

Very valid point. But on OE teams, L unlocks are amazing. Which is what this young lady does.

The 1.5x damage only applies to the matched orbs. So 3 prong matches on a monster with 3 prongs awakenings would be like 3.3x multiplier on those 12 orbs.

But L matches apply to all of the monster's damage. Two L matches on a monster with two L awakenings would be like a 5x multiplier on those 10 orbs.

It's pretty silly if you inherit that one equipment monster that can add an L awakening onto Gronia, and then match 3 L combos. It's like a 38x additional multiplier on those 15 L-matched orbs~
But I think it's only possible to set up 6 combos with 3 L matches, so it's not as practical as 2 L matches.

She won't be clearing end game content, but she can still be used as a fun farming lead, or just by a new player to clear up through mythical level dungeons. She still has her uses. Not all players are whales or have reached end game content yet. #perspective

None of the 5 star cards in the collab are to be used as a leader, that much is already known. The standard was set the moment they announced the machine takes 10 stones per pull.