動ラ下二 / よ / 最初に / 女子 / お世話

Hi,


1. 動ラ下二

This seems to be a dictionary classification or usage note or something. What does it mean?

めさる - 辞書すべて - goo辞書


2. 「エクスペリアームス！武器よ去れ！」

This is a spell used to disarm an opponent (エクスペリアームス is a made-up Latin-sounding word). I think I get the general idea of 武器 and 去れ, but what about よ? Is it like the speaker is addressing the weapons with 「武器よ」?


3. 二人は生徒の群れに入り、二人ずつ組ませた。ロックハ ートは、ネビルとジャスティン・フィンチ・フレッチリーとを組ませた。スネイプは、最初にハリーとロンのところにやってきた。

Does 最初に mean that Snape arrived there before he (Snape) did anything else, or does it mean that Snape arrived there before Lockhart did?


4. マルフォイはニヤニヤしながら気取ってやってきた。そ の後ろを歩いてきた女子スリザリン生を見て、ハリーは「鬼婆とのオツな休暇」にあった挿絵を思い出した。

How can we be sure just from this that 女子スリザリン生 refers to one person and not several? Or can't we be sure?


5. ども、愚弟がお世話になってるようで。

Who is grateful, the speaker or 愚弟?

1)
動詞ラ行下二段活用

2)
That's right. It's a sentence final particle for calling.

3)
The former. It's Snape's first action.

4)
It's possible to interpret it as "plural", but 女子スリザリン生たち would be more common for the case.

5)
The speaker. He says thanks for your taking care of my brother.

Thank you.