Dina ate Eren's mom because she knew her husband was cheating on her with that woman and did it to get revenge.
The reason why it appeared was because of the plan of Erwin Smith to put the Titans against Reiner and Bertolt. In an attempt to eat everything in its path, the Smiling Titan killed and devoured Hannes when he was trying to save Eren and Mikasa from being eaten.
Zeke emerges from his ruined Beast Titan at Levi's mercy, but he is rescued soon afterward by the Cart Titan. Zeke's injuries leave him unable to use his Beast Titan for the remainder of the battle. At some point, Warrior candidate Colt Grice was selected by Marley to be Zeke's eventual successor as the Beast Titan.
The Beast Titan (獣の巨人 Kemono no Kyojin?) is one of the Nine Titans. It has a unique ape-like appearance and is slightly larger than most Titans. It is currently in the possession of Zeke Jaeger, and first appeared during the invasion of Wall Rose.
Assuming you're well, the most straightforward reply to the question how are you? would be bien (fine) or even ¡muy bien! (great!). Other less positive replies could be vaya (so-so), regular (not bad), vamos tirando (getting by).
Whatever is a slang term meaning "whatever you say" , "I don't care what you say" or "what will be will be". The term is used either to dismiss a previous statement and express indifference or in affirmation of a previous statement as "whatever will be will be".