Ethan 

Standing on the highest peek of the clock tower he watched as Levi's squad literally set the titans on fire from the inside out and seeing the nape of the neck get completely obliterated. He smiled and even let out a slight chuckle, "Nice!" He remarked to himself, when he saw Lana making her way up to him. 
He turned his attention to all around him and saw a 7metre titan coming their way, aiming straight for Lana, when she couldn't see him She'd never make it in time. "Shit!" He cursed to himself, putting his stance on guard, ready to leap into action the moment the titan was near enough for him to use his ODM gear and swing to the titan's neck and cut him down once and for all. "LANA WATCH OUT!" Ethan shouted to alert her of her incoming doom.

Lana

Running across the rooftop she was aiming for the clock tower to meet up with her twin brother. "Just a little bit further Lana" She mumbled to herself, when she almost tripped on her own footfall when she heard a massive explosion from behind her. Stopping momentarily, she turned around and saw Levi's squad literally blowing up titans, wiping out the nape of the neck in the process. This made her joyous, when she suddenly remembered she had to get to Ethan. She began to pick up her feet once more and began running again, placing her index fingers on the trigger ready to fly onwards and upwards. "Lana watch out!!" She heard, and as she looked at Ethan's stance and warning, she saw a 7metre charging towards her. "No no no" she muttered, picking up her speed as much as she could. 
It was then she saw Ethan swing into action and land on the titan's beck, before running upwards and slicing the nape of the neck swiftly, causing the titan to stumble and fall. Lana continued to run forward and when the timing was right, she pulled the trigger and sent herself flying onto the clock tower. 

Ethan AND Lana

Both sibling now landed on the clock tower when they're attention was caught from Bachus shouting at them, asking where their squad was. "FURTHER UP SIR!" They shouted back in perfect unison, when they both saw him get get distracted from a titan he clearly recognised. "We gotta stop him" Lana told her brother, when suddenly Levi barked orders to them to stop him. "SIR!" They called back in agreement, before chasing after him. 

"Bachus you gotta stop this!! Fall back!!" Ethan called after him, when Cassandra came blasting passed them to also stop him. Bachus was a friend of the Winchester family. He was the one soldier that knew their father. They were not prepared to lose him.