Q1: I have both this card and ST2-12 Matt Ishida in play. How do I activate their effects?
You can resolve their effects in any order. For example, if you're starting the turn at 1 memory, you can resolve this card's effect first to go up to 3 memory, then activate ST2-12 Matt Ishida's effect to go to 4 memory and above.
Q2: This card's On Play effect says "Look at your security stack." What does this mean, exactly?
It allows you to look at all of the cards in your security stack without revealing them to your opponent. You then pick one of those cards, reveal it, and add it to your hand.
Q3: What happens if I use this card's On Play effect to add a card from my security stack to my hand that isn't yellow?
Shuffle your deck without triggering <Recovery +1 (Deck)>.
T.K. Takaishi BT1-087 R [Start of Your Turn] If you have 2 or less memory, set your memory to 3.[On Play] Look at your security stack, then reveal 1 card in it and add it to your hand. If that card is yellow, trigger <Recovery +1 (Deck)>. (Place the top card of your deck on top of your security stack.) Then shuffle your security stack. --- [Security] Play this card without paying its memory cost.
Takeru Takaishi BT1-087 R [Start of Your Turn] If you have 2 or less memory, set your memory to 3.[On Play] Look at all of your security cards, then reveal 1 of them and add it to your hand. If that card is yellow, trigger <Recovery +1 (Deck)> (Take the top card of your deck and place it on top of your security stack). Then shuffle your security stack. --- [Security] Play this card without paying its memory cost.
T.K. Takaishi BT1-087 R [Start of Your Turn] If you have 2 or less memory, set it to 3. [On Play] Search your security stack, reveal 1 card among it and add it to your hand. If it's a {{Colour|yellow}} card, <Recovery +1 (Deck)>. Then, shuffle your security stack. ---
高石タケル BT1-087 R 【自分のターン開始時】メモリーが2以下のとき、3にする。【登場時】自分のセキュリティの内容を全て確認して、その中の1枚をオープンして手札に加える。そのカードが黄のカードのとき、≪リカバリー+1《デッキ》≫(自分はデッキの上からカードを1枚セキュリティの上に置く)。その後、自分のセキュリティをシャッフルする。 --- 【セキュリティ】このカードをコストを支払わずに登場させる。